As I’ve thought more deeply about how to answer this question over the years, I’ve come to a realization that the problem is not the answer, but the question itself. For those who’ve asked it, I don’t think it’s always coming from a place of “quick money.” If we reframe the question, I think there’s room to empower and actually help those who’ve asked it—to give them a foundational understanding of what it really means to generate an income online.
Case Schiller only tracks price appreciation of RE. RE as rental investment vehicle is measured primarily on rental yield or cap rate or some other measure. Price appreciation in that scenario is only a secondary means of growth, and arguably should be ignored as a predictor of returns when deciding on whether or not to invest in rentals. More important key performance indicators for rentals are net operating income and cash ROI. Appreciation, if it occurs, is a bonus.
Salvage and resell. Do you love antiques or have a knack for finding valuables at flea markets or yard sales? If you do, it might be time to consider salvaging items for resale – or even scouting out antiques to sell for a profit. While you’ll need to spend quite a bit of time searching for prospects and spend some money buying upfront, you could easily turn a profit if you know what you’re doing.
While some might think that starting a blog is an arduous effort, when you understand the precise steps you need to take, it becomes far easier. It all starts in the decision of choosing a profitable niche and picking the right domain name. From there, you need to build your offers. You can easily sell things like mini-email courses, trainings and ebooks.

 @dasjung It sounds like you paid a lot for your education, as did I. But you got to face it, today’s technology allows the average Joe to accomplish a comparable logo with much less effort than you or I could put into it, and the savings outweighs the extra benefit of our knowledge. We, as designers, have been out done. It is time to go back to school, unfortunately… 
The first follows the startup path we outlined above: You have a disruptive idea for an app or piece of software, you validate the idea with real customers, and then raise money to hire developers or a development studio to build, launch, and scale your software. If you’ve done everything right, your software will be accepted to the Apple and Google Stores and you’ll make money every time someone downloads it or pays for a premium feature.
As far as Poker goes (at least for Texas Hold’em), I’d recommend sitting at a low stakes table (1/2 no-limit is the lowest most places have) and merely being observant/make casual conversation at the table for a while until you feel comfortable. If you’ve never played, just tell the dealer and they’ll be happy to help you out (most players will notice if you haven’t played before anyways so you’re not really at a loss there). Just play “tight” (a small range of strong starting hands) and that’s a pretty good place to start!
While we all have some extra time, it often doesn't feel like it. But it also doesn't take too much effort to make some extra dough on the side. We're not talking about millions upon millions here -- we're mostly talking about doing small, bite-sized projects to generate some fast cash. And depending on your skill set, you could easily make a few hundred dollars or even a few extra thousand per month. 
Robo-advisors are diversified investment accounts that are automatically managed by a computer algorithm (as opposed to a human money manager). If you want to invest, but don’t have the money, or don’t want to invest with a money manager, robo-advisors are for you! Robo-advisors make investing easier—and cheaper—so they’re perfect for new investors.