If you aren't using a coupon database, then you aren't saving as much as you could be. Here's how it works: you need to buy peanut butter this week, but you don't think you have a coupon for it. Stop! This doesn't mean you have to pay full price.
Just head to your favorite coupon database. Mine is (of course) the one at Money Saving Mom. Just do a search for the product you need a coupon for, and the results will show you all the coupons issued for that item. This is great for finding printable coupons, but it's also helpful if you organize your coupons using the insert method.
The database allows you to search by product name or by brand, and then narrow results based on the coupon source, the date it was issued, and more. There are people out there making this couponing thing so easy for us!