If this is the first time you are hearing about this, though, then we actually do not recommend trying it. The average skill level of players on the Internet has improved so much over the past few years that it’s virtually guaranteed that a new player will lose money over the medium to long-term. But hey, Ben made upwards of 6 figures playing online in poker in college, so we had to list it. 🙂
According to Uncle Sam, you need to be "materially involved" in an enterprise to earn active income. With passive income, it's just the opposite, as the IRS deems you to be earning passive income if you're not materially involved with a profit-making enterprise. By and large, expect income to be taxable if you are engaged in a passive income enterprise. You will need to report earnings to the IRS.
I have not. While I am intrigued with the possibility of making online income, it seems to be less passive then how I want to spend my time. Regarding your blog / site, you have done quite well for yourself. However, you have to keep pumping out content or your site would eventually go out of business. That sounds like more of a commitment then I would want. Regarding your book sales, it is probably relatively passive now, but certainly was not when you were writing the book. Now if you love it, great. Just not for me.

I’ve never invested in real estate (except to live in), but am always intrigued by communities like FS who seem to have such a passion for it. My intrigue stems back to my earlier comments that the long term trends in appreciation in real estate are simply not very competitive versus equities, despite what Robert Kiyosaki had to say in his book, Rich Dad, Poor Dad.
Writing an eBook and selling it on your blog can be a great money maker. Your eBook should be directly relevant to your blog’s content so you can sell your book to your existing audience. Creating a recipe eBook for a food blog or an eBook full of training plans to complement your fitness site are just a couple of examples that have the potential to sell.
For example, if you register for free with Textbroker.com and submit a writing sample, you’ll receive a rating based on your content quality. Then you can choose which projects you want based on your quality rating and earn 0.7 cent to 5 cents per word, or more. FreelanceWriting.com provides a long list of freelance writing opportunities culled from several top sites. Many of the recent listings offered hourly rates of $25 or more. For $21 a month, you can join Mediabistro’s freelance marketplace to post your qualifications for review by media managers seeking writers.
Unfortunately, I can’t answer that conclusively one way or the other. It all depends on you, what you like to do, your work ethic, personality, etc. If you are a good writer perhaps you could write a book and make money that way. Or, you could start your own website and do affiliate marketing. Just because you are young it doesn’t mean you can’t make money doing at least a few of these ideas. I wish you luck in your money making efforts!
Has anyone ever told you you have a voice for radio? Are you great at creating original characters with just your voice? There are tons of people looking to pay for quality voice overs for their corporate videos, animation series, or educational videos. Check out Fiverr and UpWork or create a profile on a specialized site like Voices.com or The Voice Realm to get started making money online doing voice overs.
Track Your Wealth For Free: If you do nothing else, at the very least, sign up for Personal Capital’s free financial tools so you can track your net worth, analyze your investment portfolios for excessive fees, and run your financials through their fantastic Retirement Planning Calculator. Those who are on top of their finances build much greater wealth longer term than those who don’t. I’ve used Personal Capital since 2012. It’s the best free financial app out there to manage your money.
Venture debt ($12,240 a year): The first venture-debt fund has returned almost all my initial capital, so I decided to invest $200,000 in the second fund. I took a risk investing $150,000 in my friend's first fund, so I'm hoping there's less risk in the second fund, given he has four more years of experience on top of his 12-plus years of experience running a venture-debt portfolio for another company.
You could also opt to use existing websites for making money. These include both active income and passive income methods. For example, you could sell some used items or invest in creating some digital designs that then can be sold on merchandise. Again, devote a sizable portion of your time to passive income so that you can slowly build up earnings that will arrive on autopilot without any extra added effort. 
You are also free to choose a fund that is based on any index that you want. For example, there are index funds set up for just about every market sector there is — energy, precious metals, banking, emerging markets — you name it. All you have to do is decide that you want to participate, then contribute money and sit back and relax. Your stock portfolio will then be on automatic pilot.

In Eric Reis’s The Lean Startup, a fantastic book about how today’s entrepreneurs and startup companies are approaching the way they create and innovate, Eric talks about how vital it is to use validated learning and scientific experimentation to be able to steer a company in the right direction. In other words, to use customer feedback and quantified data analysis (of real, non-vanity metrics) from a minimal viable product to make decisions and pivot a business one way or another.
My real job does not pay enough. I do surveys online all the time and I am always looking for more ways to make money online. I would love to work from home full time but I honestly don’t see it happening. I am already a member of the survey sites mentioned here. But the truth is you are usually going to make closer to 30 cents to maybe 75 cents per survey. I hate seeing claims that you make $5 to as much as $75 per survey and for minutes of your time. Most surveys take 30 minutes or longer. Pay closer to 75 cents (that is 3 quarters) and there are lots of times you finish the survey and don’t even get paid. Anyone who has done the survey thing for very long knows this is true.

Become a proofreader. All kinds of businesses hire professional proofreaders to look over their copy and content for errors before they publish. This side hustle is one that could work for nearly anyone since you can work from home provided you have a computer and an internet connection. You can find online proofreading jobs through websites like Indeed.com and FlexJobs.com
You can make extra money left and right if you just know where to look. If you like to ‘tinker’ I’d suggest going to the DIY section on Pinterest. You can find thousands of projects there to make, and you can sell them at a nice profit. You can make 20, 30, or 50 bucks at a time, in real money. Not the ‘get rich online now!’ stuff you see around. I make old teapots into lamps, or old shirts into aprons and sell them locally on Kijiji or Craigslist. It’s totally doable. 
In today’s world, everyone is looking for data.  Companies are spending a fortune to learn what things matter to consumers and what things don’t.  The benefits of this “big data” enlightenment are numerous.  Companies can now design products that meet your needs better than ever before.  Hotel chains are designing hotels with your preferences in mind so you don’t have to pay for features you don’t care about.  One big benefit for you is that research companies are dying to know what you think, and they’re wiling to pay you to find out.
Many people choose not to take this route because they get intimidated by complex applications and technology. The truth, however, is that you don’t need a fancy platform or special software to create a powerful online course. Your lessons can be sent out as emails, followed by action plans and/or video tutorials. This approach can be even more effective as most people check their email on daily basis. In fact, that’s the exact approach I took with some of my freedom eCourses.
If you know anything well, a place, how to fix something, how to make something, how to do something, you can write a guide for it. You can sell your guide as an e-book, offer it as a download for a fee on your site or reach out to bloggers with similar content and ask if they will offer it as a paid download on their website (for a price of course).
Writing an eBook and selling it on your blog can be a great money maker. Your eBook should be directly relevant to your blog’s content so you can sell your book to your existing audience. Creating a recipe eBook for a food blog or an eBook full of training plans to complement your fitness site are just a couple of examples that have the potential to sell.
For sure! I think that’s something Jeff and I have learned rather quickly is to definitely not put all your eggs in one basket. We had 1-2 affiliates that we promoted for the longest time that were by and large our main sources of income. We realized that if we lost even 1 of those affiliates we would be in for a huge world of hurt when it came to our monthly intake.
5. Make sure you are properly diversified. Capital preservation is underrated. We saw a lost decade for tech stocks between 2000 and 2010 after the first dot-com bubble burst. It actually took 13 years for Nasdaq investors to get back to even. Investors in the Borsa Istanbul stock market index just gave up 10 years' worth of gains after they saw a plunge in their currency, partially due to increased tariffs by the US and a lack of confidence in the government. Your passive income needs to be properly diversified in order to take the hits.

Let’s be honest. Those little people grow out of their clothes faster than you can keep up. When it’s time to get rid of the clothes they’ve outgrown, you have a few options. Put them out in your standard yard sale, sell them to a consignment store, or post them on social media. Apps like Kidizen are specially designed for selling your kid’s gently used threads. And of course, you can use other sites like Poshmark, thredUp, Craigslist and eBay to sell children’s clothing too.

With Izea, you are getting paid for whenever a company wants to advertise themselves through your blog and/or social media accounts (such as your Twitter account). You get paid electronically, and they always pay. They partner with big name companies such as Marriott, Netflix, Walmart, Kraft, Lego, and more. It's an EASY way to make money through your social media accounts, so I highly recommend you check Izea out.
I collected cans in my teens and made a few extra bills for spending money. If this idea is of interest, you might be motivated to hear the true story of Maisie Devore who was able to raise money collecting cans for a community swimming pool.  She was able to save $73,000 over three decades and is still collecting. Whoa! Learn more about this idea by reading my collecting aluminum cans for cash post.
One of the most appealing options, particularly for millennials, would be #12 on your list (create a Blog/Youtube channel). The videos can be about anything that interests you, from your daily makeup routine (with affiliate links to the products you use), recipes (what you eat each day) or as you mention, instructional videos (again with affiliate links to the products you use). Once you gain a large following and viewership, you can earn via Adsense on YouTube.
It will take a long time to build up your photography skills when you start, but it can be a great job for stay-at-home moms if you choose your genre carefully.  For example, if you shoot weddings you’ll have to work every weekend, which means goodbye family time.  You wouldn’t have chosen to by a stay-at-home mom if you were willing to not be with your family.  But there are other genres that work great for moms, like doing real estate pictures for Realtors, doing baby photography, senior pictures, etc.  I wrote more about the myths of being a professional photographer here.
Now, it’s time to start creating and uploading content. Make sure you’re using a high-enough quality camera (most smartphones will work but I’d suggest at least having a tripod so your footage isn’t shaky), but don’t worry about being perfect at first. The beauty of YouTube is that you can continue to test out different content and styles as you find what works for you. Instead, stick to a regular schedule to build up your subscriber base.
One way that people have been earning money online recently is going to your local stores and hitting the clearance section.  Buy up a shopping cart full of stuff and then mail it to Amazon FBA (fulfilled by Amazon).  Amazon then sells the items and mails them for you, and pays you your cut.  There is even a really cool app for your phone that you can use in the store to scan the barcode and see how much money you could make selling it on Amazon, even including your shipping costs.
Take good pictures. Some of the options below don’t require you to actually take the picture and sell the product, but for the ones that do, make sure you take a clear picture that makes your product stand out from the others.  If you’re going to be taking a lot of pictures, set up a small “studio-like” area in your home with a backdrop and proper lighting to really make your pictures come across as professional. And of course, you’ll want a good camera too.
Well written piece, but I question the core premise. Why the fascination with maximizing “income” (passive or otherwise). Shouldn’t the goal simply be to maximize long-term after tax growth of your entire portfolio? If this takes the form of dividend paying stocks, so be it. But what if small caps are poised to outperform? What if you want to take Buffet’s or Bogle’s advice and just buy a broad market index like the S&P 500, (no matter what the dividend because you’ll just have it automatically reinvested to avoid the transaction fees).
Alibaba is a Chinese eCommerce store that matches Chinese suppliers with buyers all over the world. Prices are extremely cheap, providing the possibility of large profits. However, with the potential profits comes more risk. As you are dealing with suppliers in China, if the quality of the product that arrives isn’t up to standard there is little that you can do about it.
If you’ve got some free time and don’t live in the middle of nowhere, becoming a Lyft driver can be a very lucrative side hustle that allows you make money fast. And right now, they’ve got a promotion going on where any new driver will instantly get a $300 bonus after completing their 100th ride. If you start now and hustle hard on the weekends, you can probably unlock that bonus within a few weeks of driving (and that’s in addition to your normal earnings).

Whether it’s an important consumer application, a specialist app to solve a particular niche problem, or even a time-wasting game you can play on your phone, you can create a massively successful business if you build software that helps people. (Look at the rise of Slack—the team communication software that went from side project to billion-dollar company in just 2 years.)
Using a food delivery service can’t necessarily earn you money, but it can help you save you money if you constantly find yourself throwing out half the food you buy. Food delivery services send a box of food every week with new, sometimes unique vegetables, meat, fruit, and so on. If you don’t have time to shop and want simple meal-prep that leads to a good meal, a food subscription service may be perfect for you.