- Wash clothes in cold water.
- Put your PC to sleep.
- Drive steadily, and a bit slower.
From the same post:
A common theme among these tips is that heating things and cooling things uses a lot of energy. A recent Consumer Reports article emphasized this point: you use the most energy when you attempt to alter temperatures. Toasters, ranges, refrigerators, air conditioners, etc. are all energy hogs because they heat things and cool things.
Consumer Reports is a terrific magazine for cost-conscious shoppers, full of recommendations on products, techniques, and services to save you money.
Looks like I should start reading that, as well.