Drop cashback is an app that lets you link a credit card, and automatically earn rewards. This one is like a "set it and forget it", because all you do is link your cards, and whenever you make a purchase, either online or in store with a linked card, you get a percentage back.
A Credit Union referral bonus that will give you $100 when you direct deposit $200 dollars within 45 days. Account has no fees and no early cancellation bonus. Easy money.