ShopAtHome.com, you can earn rebates on your online purchases plus you get $5 just for signing up. There are even coupon codes available so that you can save even more. Just go here to sign up and everytime you shop online be sure to go through ShopAtHome.com.
Just one example of items that I have purchased online recently - I needed ink for my printer, I purchase directly from Dell. Well Dell is one of the online stores available - I made 3% off of my purchase.