TheStreet.com offers 5 simple ways to reduce stupid spending decisions. The article is long, and divided over a few pages, so here’s a brief summary:

1. Make a list before you go shopping
2. Don’t buy things not on your list
3. Create a waiting price for your items, and wait for the price to go that low
4. Create a waiting period, a time out after which you may violate the waiting price
5. Decide to only purchase high-priced items at 20% below retail price