Set your thermostat a few degrees lower in the winter and a few degrees higher in the summer to save on heating and cooling costs.
Install compact fluorescent light bulbs (CFLs) when your older incandescent bulbs burn out.
Unplug appliances when you're not using them. Or, use a "smart" power strip that senses when appliances are off and cuts "phantom" or "vampire" energy use.
Wash clothes in cold water whenever possible. As much as 85 percent of the energy used to machine-wash clothes goes to heating the water. Use a drying rack or clothesline to save the energy otherwise used during machine drying.