I have never been a big coupon user but now that we are ensconsed in a recession and I'm in a frugal living mode, I have started couponing in a small way, cutting or printing coupons for things that I normally buy. It's becoming a game to me and I'm always excited when I save a few dollars.
In addition, when I'm planning on going shopping, I type into my search engine the name of the retailer + coupon code (for example: Old Navy + Coupon Code.) The other day I saved 30% at Old Navy by doing this. It only took a few seconds to find the coupon and I saved a bunch of money. Some stores do not accept online coupons so before you make a trip to the store, ensure they will use your coupons. Here are my favorite online coupon sites. Please feel free to comment if you know of other good sites.