I have tried to sign up & complete cash for surveys in the past and then felt like I was being led down a rabitt’s hole, going from one “skip” and/or “submit” to another without ever, seemingly, actually completing the entire process.  So, when I saw CashCrate recommended in ptmoney.com, I thought it was going to be more straight forward, but, alas, no, I entered the rabitt’s hole once again, coming up for air only after an entire hour spent hopping, skipping, and jumpring all over the place, netting 25 cents in earnings!  Has this been anyone else’s experience and what has been done to remedy the situation?  It seems like there must exist an insider’s trick or, at least, know-how that I am missing. 
This is slightly different than eBay Arbitrage. Find a distributor that will sell to you at their discounted prices. List these items online. Buy and ship to your heart's content. Basically, you become a reseller of computers and other hardware. Another thought here is to sell computer parts. Can you find a part that seems to be in demand? If you can supply the demand, you may just have yourself a part-time business.
Freelancing is the next best thing to being paid more for your full-time work, because professional work always pays more than unskilled. To find opportunities, let former colleagues or other personal connections that you’re available for freelance gigs. (Here are some ideas on how LinkedIn could be useful for that.) Or, post on marketplaces particular to your field. For instance, Mediabistro, a journalism site, allows freelancers to post profiles of their experience and services. Though these are more up to chance, designers can bid on jobs at 99Designs.com or submit a design at Threadless, to see if it will be crowdfunded. Elance-Odesk also lists many freelance opportunities, and you can also post your own services on Fiverr, although some freelancers say these services create a race to the bottom on fees and so are not very lucrative. If you're new to freelancing, here's how to set your rates, and here's how to negotiate raises with clients.
One of the things I'm surprised your article doesn't mention is the tax advantages of this type of investment. The depreciation and rehab costs (purchasing distressed properties) can be huge deductions to ones income taxes, which none of the others have. Then, along with the appreciation of real estate, this passive income investment outperforms the notion of maxing out my 401k as well.
I guess I just don’t understand why the specific importance of focusing on “dividends” instead of focusing on the total return of your investment, including stock appreciation. I don’t really care if a company decides to issue a dividend or not; presumably, if they don’t issue a dividend, then they’re doing other things to increase the value of the company, which will be reflected in the stock price of the company. As an investor, I can make money by selling a percentage of my holdings or collecting dividends, and I don’t really care how that’s divided up – it’s an artificial distinction.
What’s the catch? None, really. Cash back apps act as affiliates for many online merchants, which means that whenever you make a purchase through one of the apps, they get a small commission — but then, they give you a portion of that commission as “cash back”. For example, if I buy a pair of Nike shoes through the Ebates app (or website) and spend $75, Ebates may get a $10 commission but then they’ll pass $7 back to me. It’s basically a way to get sale prices on stuff that isn’t on sale!