To start, I will talk about the easiest one i have found. It is called Swagbucks. Using Swagbucks on your iDevice is easy but you will want to sign up using this link. After signing up go ahead and verify your accound. Then download SBTV and Swagbucks from the App Store. Login using the account that you just created. I recommend when your not using your iDevice to plug it up and start SBTV. After you start it, just lay it face down and forget about it. The app has auto-play.
This list will be updated whenever I find other sites that work good.