Yeah, you can do that. It's your money, at least for awhile. My wife showed me the value of coupons, because her family needed them to survive. She routinely walks out of grocery stores with 200 - 250 dollars worth of stuff, for 30 - 50 bucks. It is an art, so to speak. If I hadn't seen it her do it so many times I wouldn't have believed it possible.
That's a great talent if you can do it. My wife and I tried to do the coupon thing when we were first married and were "dirt poor" but we found a couple of things working against us. First, the coupons we found were hardly ever for the items or brands that we buy, which meant that to use them we would have to buy a brand we didn't neccessarily like, or an item we probably wouldn't have bought anyway (not much of a reason to use a coupon). Secondly, we read how people were making out like bandits with coupons by taking advantage of special double and triple coupon days at the stores. Well, that's all well and good if the stores in your area actually have double/triple coupon days or policies. We've never lived anywhere where any of the grocery stores did that. We always heard people on tv talk about it or read about it in the "thrifty hints" column in newspapers or magazines, but it just never happened where we lived.
So instead of coupons, we figured out other ways to make the budget stretch farther and we pretty much just use coupons once in a great while, like when a special sale flyer comes in the mail and we happen to notice one for something we routinely buy anyway.