The ad in Sundays paper says that they will double any Proctor and Gamble coupon up to $4 off. However, I found out that they will actually double ANY coupon up to a total of $4 off! ie. They will double all coupons, up to $2 Q's. Here are a couple of sites that will give you some really good examples of how to get a lot of stuff for super cheap:
Nicole's Nickels and Common Sense with Money.
Note: You can make the diaper deal at Common Sense with Money even better if you have some of the $2 diaper coupons! Go HERE for a $2 off any one Huggies Diaper product. (Don't forget to hit the backspace to print it twice!)