Lower the thermostat on your water heater to 120 degrees.
Plug home electronics into power strips; turn power strips off when equipment is not in use.
Turn off lights when leaving a room.
Check the exterior of your home for potential air leaks. If you find gaps near water spigots, dryer vents, or air conditioner hoses, fill with expanding foam to prevent air leaks.
Replace incandescent light bulbs with Energy Star compact fluorescent bulbs.
Clean air filters one time per month.
Draft-proof windows and doors with caulking or weather stripping.