I hardly use any coupons at all.
We grow a lot of food, and we have to cook from scratch because my wife can't eat most of the prepared foods.
I was just thinking about the whole coupon thing the other day because the woman checking out in front of me had almost $30 in coupons, and there I was with $0 looking like an imbecile. On the other hand, she spent close to $200 on a bunch of brand name stuff, and I spent about $80, mostly on staples like milk, rice, and meats. She'll be back spending more next week, Im probably set for two or more.
We eat mostly asian food, because my wife can't have anything with gluten in it ... so rice is a mainstay for us. Rice and home-grown vegetables for our main meals really cuts into grocery store bills until winter arrives. Whatever meat is currently cheap for me and the kids, none for the vegetarian wife. (yeah, we have to make two dishes most nights).
I expect that if I start doing the coupon thing, I will end up with a pile of over-priced brand-name cleaning supplies that I don't need, and snacks I need even less. I rarely see coupons for anything I actually need, now that the kids are out of the diapers and wet wipes stage, and we've so far kept the kids from wanting to eat their body weight in Oreos every week by feeding them pears and peaches and such.