Ebates?

I love ebates, i know there are sites out there that pay faster but my lifetime earnings at ebates and the lack of trouble in processing rewards can't be beat. I can even earn on ebay and amazon shopping.
From their website:

Ebates is the pioneer and leader of online cash back shopping. ebates pays members cash back every time they shop online as well as provide them with the best coupons and deals online. Founded in 1998, ebates has paid over $85,000,000 in cash to its members. That's why over 12 million people have joined ebates, and we're excited you are ready to start earning cash back, too. Here's how simple it really is:

Each store offers a different cash back percentage. Just look at the percentage next to the store name on the Ebates site to see how much savings you will earn.
I travel frequently and so every time I book at hotel room at Hotels.com, i log into ebates first and click the hotels.com link. Then not only do I earn 1 free night for every 10 stayed at hotels.com but I also earn up to 4% cash back for traveling.