https://www.opinionoutpost.com/ This site you can earn cash back which they send you in a check.
https://www.opinionplace.com/new_landing.adp?sesid=7y90h634 At opinion place you can earn paypal credits or Amazon GC that you can transfer to your account!. I have bought a treadmill belt and an electric blanket with my credits just to name a few things.
http://www.fgglobal.com/ This is a national site where you can find Focus groups or paid studies in your area. I did one online recently and got a $100 GC!