from The Consumerist.
...take the coupon section out of the Sunday paper and put it aside for four weeks - don’t even bother to look at it. Four weeks later, open it up and clip everything that’s even remotely of interest, whether you’d buy it normally or not.Read the whole thing.
At that point, take the wad of coupons to the store and just look at the shelves. Magically, most of those coupons you have will sync up very well with stuff that’s already on sale on the shelves. When you combine the sale price and the coupon, you’ll usually be able to get items for next to nothing.