If you have a knack for a certain subject and live near a college, consider offering up your brain power and teaching skills for some quick cash. Grade school kids need help too, and parents pay better than college students. You can take this idea to the next level and scale by tutoring online. We have an interview post dedicated to a chemistry tutor who took his skills to Tutor.com.  To be successful, you have to have a good grasp of the concepts but also be able to find a way to relate topics using real-world examples.
Upwork: This website offers a great marketplace for selling just about any professional service. You don't need a merchant account, website of your own or anything else for that matter. All you need to do is be able to provide a high-quality service at a reasonable price. But be informed, you will have to compete with many others that are constantly bidding on open jobs. 
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.

A site called User Testing will actually pay you a fee to evaluate websites. It typically pays you $10 for each video that you review – which typically takes about 20 minutes. If the work is there, and you are particularly good at it, you could earn up to $30 per hour. That’s a pretty solid pay rate for a work-at-home job. You wouldn’t have to work a whole lot of hours to generate a decent part-time monthly income.
If you have a specific and in-depth expertise, like programming, coaching, or consulting, then having a well written sales page on your own website can be rewarding. I do this with my web design, SEO, Social media, and coaching services. If you want to become a highly-paid freelancer, I highly recommend you first build your own online platform so you can share your professional expertise, knowledge, and life story with the world. Here's how to start your first website in less than 24 Hours.
Are you a professional in a field that can help answer questions for people looking for your expertise? Websites like JustAnswer and LivePerson match you up with people looking for answers to technical or professional questions. You can make money online by simply answering these questions and providing the right information to people based on their individualistic circumstances.
To help you weed through all the sites out there, we’ve actually written an article all about survey sites to teach you the ins and outs and give you several sites to get started with.  We’ve actually vetted these sites and know that they’re the good ones.  So if that’s something that interests you, I encourage you to read this article and get started making some extra cash today with no startup cost.
Look into survey sites like MyPoints, Survey Junkie or Vindale Research where you’ll get paid just for taking surveys and giving your opinion. Sounds like a pretty sweet deal, right? Just remember, these sites are looking for specific criteria. So you might have to wait for the right survey to come along that you qualify for. Plus, you’ll have to reach a certain threshold before you can cash out your points. It’s not a get-rich-quick opportunity by any means, but that extra cash can still add up over time. If you’re the patient and persistent type, give it a shot!
Hello from the UK! Fundrise and Wealthfront are only available to US residents it seems :(. Any other readers from the UK here? The only thing I have managed to do from Sam’s list is getting a fixed rate bond (CBS is having a 5-year fixed rate at 2.01% – not great but the best I could find ). Don’t know if the FIRE movement will ever take off here but would love to trade tips/ideas on how to reach FI and have the freedom to consider alternative rythms to living.
When I purchase an existing online business, I look for cash flow over the past year and where the money comes from. I want the sources to be more passive so that it does not take a lot of my time. Also, typically I will make an offer that is 18 – 24 months of profit so that I know that I will get my money back within the next two years. I hope that helps!
​Udemy is an online platform that lets its user take video courses on a wide array of subjects. Instead of being a consumer on Udemy you can instead be a producer, create your own video course, and allow users to purchase it. This is a fantastic option if you are highly knowledgeable in a specific subject matter. This can also be a great way to turn traditional tutoring into a passive income stream!

Similiar to Adsense, Media.net powers the Yahoo! Bing Network Contextual Ads and is probably the second largest contextual advertising company in the world. I've been running some Media.net ads for a few months and the income was very similiar to adsense. Bear in mind that their approval process is a bit more extensive than Google AdSense. -One has to get a certain number of page views monthly to get an account with them.
Secondly – and this is just quibbling – I’d change that risk score. The risk of private equity is incredibly high and should be considerably riskier than bonds! You are providing a typically very large amount of capital to one business that you agree to have no control over, and the success or failure of that business over a locked, predefined term determines your return. And in the few deals I’ve negotiated for clients, my experience has been that there are often management fees, performance fees, etc. that may cut into your potential gains, anyway. You’re putting a lot of eggs in one basket, and promising an omelet or two to the management no matter what. You really need to be confident that you found the next Uber before you take this giant risk!

You can also market your ebook on your own website or blog, particularly if the site gets good traffic. Still another method is affiliate marketing. You can offer to pay sites related to your ebook a percentage of the sale price – say, anywhere between 20% and 50% – for them to post an ad or linked article for your book on their site. This could enable you to market your ebook on multiple platforms for greater market exposure.
Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online. 
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