If you live in an area where Uber or Lyft operate, why not become a driver? If you're looking to make some short-term cash, you can definitely rake it in by working for one of these popular car-hire apps. As long as your vehicle fits within the specifications of their program, and you have a clean license, you could do this on the side, especially if you're in a crunch for cash.

This was a wealth of helpful information, thanks. In the first section you described how you found your niche. Any more suggestions on how I would find a niche that would be profitable? I understand you probably want to find something that you can write good content on, but what steps would you take to make sure to validate that it will be a good niche to work on? Thanks for any help Tom.
If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog.