RewardPort will reward you for taking surveys, signing up for offers, reading email and shopping online. Daily surveys are worth 100 points, earn 1000 points for referring your friends. Earn up to 2000 points for signing up for things like Home Depot newsletters, and free samples of well known products.
You can also earn by shopping! Old Navy gets you 8 points per dollar, Target gets you 3 points per dollar. Choose from dozens of other merchants too. Then redeem your points for gift cards. 4500 points gets you a $10 Amazon gift card.That can add up fast as well.