Change your light bulbs to compact fluorescents (CFL)

Clean or replace air filters on your air conditioning unit at least once a  month.

Adjust the thermostat a couple of degrees higher in the summer and lower in the winter.

Caulk and weather strip all your doors and windows.

Wash and dry only full loads of laundry and dishes.

Turn down the thermostat on the water heater to 120 degrees.

Buy from local vendors  it reduces the amount of fuel consumed in transporting products.

Turn off electrical equipment and lights when not in use.  75% of all the electricity consumed in the home is standby power used to keep electronics running when they are off.

Keep your car tuned up and tires properly inflated, it will optimize the performance of your car and keep your gas mileage at its peak.

Plant trees to shade your home.