One of the sites I recommend going to for coupons is Coupons.com.
I have added a quick link to the site on the right side of this blog. Feel free to click on it to get to even more coupons!
I have to tell you that each click generates a payment to me. Not sure how much I'll be getting, but feel free to click on it as much as you want! : )
A few other sites for online (printable) coupons:
www.mambosprouts.com (coming soon, organic food)
A Full Cup - looks crazy, but start browsing and see what you come up with!
Coupons, Inc. - scroll down, lists coupons at product websites