A few months ago I signed up at Vocalpoint. It's a place where people come and give their opinions of different products. They will also occasionally send you really nice coupons for free products.
The first set of Vocalpoint coupons I received was six coupons for Rice Krispies. One was for a free box, outright and there were five more for a dollar off each. I hit our local supermarket, which was having a sale on Rice Krispies for $1.50 a box. I walked out, completely giddy, with six boxes of cereal for $3.
Since then I've received similar coupons for Kashi cereal, Pantene, and most recently for Dole fruit jars. One coupon is for buy one get one free, and there are five more $1 off coupons.
Since signing up I haven't received a lot of spam from them (I think I'll get maybe one email a month), so they won't clog your inbox or spambox with anything.
It doesn't take long to sign up and you can save tons of money while stocking your pantry. Click here to register.