Do not over-wash clothes. Delicate clothes don't need as long a wash cycle as dirty work clothes.
Presoak or use a soak cycle when washing heavily soiled garments. You'll avoid two washings and save energy.
Clean the dryer lint filter after every load to improve air circulation and quicken drying.
Dry towels and heavier items separately from lighter weight items.
Don't over-dry clothes. If your dryer has an auto-dry feature, use that instead of the timer.
Open curtains and blinds to heat rooms naturally.
Install a programmable thermostat.
Listen to your mother. ("What do you think we own the electric company?!") Turn off everything that's not in use: lights, TVs, computers, electronics.
Insulate your hot water pipes and water heater with approved insulation materials.
Other easy ways to save include
Using the right pot or pan on stove burnersA 6" pot on an 8" burner wastes over 40% of the burner's heat.
Taking showers instead of baths and installing a low-flow showerhead to reduce water use by 50% or more.
Fixing leaky faucets around the house A leaky faucet wastes gallons of water quickly.
Using cruise control on the highway. It helps you maintain a constant speed and, in most cases, it will save gas.
Replace four 60-watt standard light bulbs with equivalent GE Energy Smart light bulbs and you will save $144 over the life of the bulbs.*