Along the same lines as trivia, you can get paid for just using your mobile phone and allowing companies to know what you're doing on it. For example, Nielson Mobile Panel is an app that you can earn rewards on just for having it installed. It will take snapshots of what you're doing and use those for advertisers to know more about your demographic. It takes away some privacy, but you get paid for it.
17. Amazon – Have you heard of FBA? It stands for “Fulfilled by Amazon” and it’s getting pretty popular. Basically, you buy products (in bulk is best) and ship them to Amazon for them to store. When your products sell, Amazon packs them up, ships them out and sends you the money (after taking their cut). There are people making a full-time living from FBA, while others just do it for some extra money.
Focus on the surveys and offers at the top of the list. Here's a tip not many people know. CashCrate has a special algorithm that automatically selects the best surveys and offers and places them at the top of the list. There are several factors that go into determining which are the “best”, including payout, approval rate, and a variety of other factors. But all you need to know is that these surveys and offers are great, so you can do them in confidence!

Here's a far easier way to receive passive income: Use cash-back or rewards credit cards. (If you're carrying a lot of debt or don't have the discipline to use credit cards responsibly, you're best off not using this income-generation method.) You can collect flat-rate cash-back percentages up to about 2% with lots of cards, while some cards offer more focused rewards or cash back based on certain kinds of spending or certain retailers.

Rover is a dog walking and pet sitting website that is always looking for qualified dog walkers in cities all over the United States. So when you take your pup on a walk, you can also take a second (or third) dog with you and get paid to walk. 30-minute walks fall in the $10-30 range. With a neighborhood route, that can add up quickly! You’re just a short application away from getting started.