Here are some rewards sites out there. In other words, you get money back just for doing what you already do.
A search engine that pulls results from Google and Bing, but is ad-funded. As you earn bucks, you can redeem them for rewards, sweepstakes entries, or gift cards to popular retailers such as Target and Amazon. There are a variety of ways to earn, including surveys, polls, and shop-and-earn, in addition to just searching.
A cash-back/shop-and-earn rewards site.
Snap by Groupon
A new app from group deal site Groupon. Download the app to your smartphone (or use the website), do your regular grocery shopping, snap a quick picture of your receipt, and upload it to the app/site! Once you reach a certain cash-back threshold, they'll send you a check. You get cash back on a variety of items, and it doesn't matter where you do your shopping.