Kellogg's has a great mail in rebate! You need to have the UPC codes from participating Kellogg's cereals. Raisin Bran, Smart Start, All-Bran, Corn Flakes and Rice Krispies are all on the list. You mail them in with this form http://www2.kelloggs.com/AARP/rewards/FIMSingle.pdf and they mail you a $10 debit card! Remember to see what codes you already have before you run to the store, I know I have a few of these in my cabinet.