Ebates

I will be the first to admit - I kept hearing about Ebates, but thought it was some kind of scam.  I also thought it was going to be a pain to use if by some chance it wasn't a scam.  But for some reason I decided to sign up about 3 months ago, and now I'm kicking myself for not doing it sooner.
Here's how the site works.  Say you want to do some online shopping.  Go to Ebates first and find the store you want to shop at (they have hundreds of stores on their site).  Click on the store, which will take you to the store's web site.  Shop as normal, check out as normal, and get cash back.  Yes, that is all there is to it.
Ebates partners with these stores and you can get anywhere between 1% back to 25% back.  They credit you pretty quickly - their FAQs say about 2 days, but I have had some stores, like Target, credit me in less than half an hour.  There have been two times where it has taken over a week to credit me.  I simply went to their help page, filled out a form, and I was credited in less than 10 minutes.
So here has been my experience.  When first signing up I got to choose a $10 gift card for a store like Target, Amazon or Macy's.  I chose Macy's, and before I even made my first online purchase through Ebates I received my gift card in the mail. I have made 18 purchases in the past three months, ranging from $2.99 to $115.99 and have received $27.98 back.  Ebates has 3 month pay periods, so they have deposited $2.32 in my Paypal account, and the rest (for purchases made August through October) will be deposited on the 15th of November.  I also received an additional $5 credit because one of my friends joined and used the site.  Also note that if you do not have a Paypal account you can get a check sent to you.
Ebates not only gives you money back but they offer coupon codes for stores.  So you not only get money back but you save money to begin with.  Talk about win-win.  They will also have double cash back for selected stores for a certain amount of time.  I am looking at one store now and their cash back was 20% but has now doubled to 40%, wow.
There are a few disclaimers.  First of all, you MUST go through their web site to get credit.  Second, you will not be credited for tax or shipping fees.  Third, realize you will not get your check or deposit immediately because of the payment schedule.  You should get credited immediately, but refer to their schedule for when you actually get the money back. Finally, make sure to check the terms and conditions for EACH store.  They are all different and some of them state that you will not get cash back if you use a coupon code found outside of Ebates (I have yet to encounter that problem though).
So give Ebates a try.  If you don't like it you never have to use it again, but I have a feeling you'll get hooked and, like me, wonder why you didn't sign up before.
You can sign up under me by clicking here or just go to Ebates.com