I use to coupon all of the time. I've gone back to it because my business is slow and the economy is so bad.
Here are some extras:
I buy meat on "Manager's Special" on the day we're going to eat it. This is the stuff that expires the next day or day after. There are dollar off coupons on the packages. I can get hamburger, pork and chicken for less than a dollar a pound as a result. It sounds iffy but I have recipes for things like ginger pork which involves boiling pork chops in water with soy sauce and some ginger until it falls off the bone. Served with green beans, it's delicious.
Our favorite grocery store is participating in a program called override.com which gives anywhere from 5 cents to 1 dollar off each gallon of gas purchased at our local gas station (which is the one we go to anyway). It depends on how much we spend at the store over a two week period. Last week, DH filled the tank for $20 instead of the usual $30.
We have a credit card that still has a good rewards program. We charge all of our utilities, groceries and gas to it and every two months or so we can get a dinner at Chili's for free.
We use the coupons in the back of the phone book quite a bit too. Our furnace people have one for 10% annual cleaning and maintenance. Our septic people have one for 5% off and our favorite Mexican restaurant has buy one get one half off there too.