LDH,
Let's see:
1. Use the "pantry principle" buy in bulk, buy loss leaders, stock up on the items you use at the lowest possible price...this allows you to never run out and HAVE to buy items when they are not on sale.
2. Know, what your having for dinner the night before...avoids lots of last minute trips to the store and/or fast food dinners.
3. Never buy, what you can easily make...things like bisquick, which is overpriced flour, baking powder and shortening. Frozen biscuits, pancakes and waffles also are super cheap to make, but cost considerably more money to buy pre-made (plus they taste nasty).
4. Know what a "good deal" is...sometimes a "sale" doesn't automatically mean a good price. Shop around, call around for prices on spendy items...find out about price matching policies, this will save time and money, and keep you from driving way out of your way to get to the store that has the "sale"
5. Maintenance is cheaper than repairs...don't wait till something is broken: cars!
6. Avoid credit card purchases like the plague.