Mechanical Turk is Amazon's take on micro-jobs. These are small miniscule-jobs that you can do for other people, which they call HITs, or Human Intelligence Tasks. These are super simple tasks that anyone can do. Some examples are listing off some URLs with certain kinds of images for one cent, or recording a few phrases with a microphone for 6 cents.
If you’re crafty (and I mean that in more than one way, wink wink), you’ll enjoy Etsy. Handcrafted items are the bread and butter here. Plenty of people make decent side money on the site, which is basically an EBay for crafters and artists. Set up a sellers account with Etsy, and you’ll be asked to set up your virtual storefront and put up at least 5 goods for sale.
Hunt for under-priced used books that you can sell online. Download an app that reads ISBN numbers so you can scan the barcodes on books. This will pull up the book’s current price on Amazon so you can see if it’s worth trying to resell it. Then, visit used book stores, thrift stores, and garage sales to look for high value books. Post the books for sale online using sites like Amazon or Ebay.