Get a programmable thermostat to adjust your home's temperature while it is usually empty - the cost of the thermostat will be paid for by not heating and cooling as much while no one is home.

Shop for energy efficiency! The Energy Guide label on the Air Conditioning unit will tell you how energy efficient the unit is in terms of the cost per kilowatt-hour of electricity.

Make sure that the air conditioning unit is sized properly for your home. An air conditioner that is slightly under-sized is fine - but one that is too large can cause serious problems.

Choose a reputable contractor who uses properly licensed and trained technicians. Even the most efficient air conditioner won't run properly without careful installation and regular maintenance.

Change your air filters monthly. Cardboard framed filters are cheaper than having pull the inside coil for cleaning, and a dirty filter allows more dirt to pass through to the coil. Monthly filter changes are your best defense!

Turn down the temperature on your hot water heater by a few degrees, and turn it off when you go away on vacation to stretch your buck.

If possible, use your oven only at night or early in the morning when it is cooler.

If your heater stops working, you can check some items. Make sure the thermostat is on the "heat" position and that the temperature is set at least five degrees about the current room temperature. Make sure the breaker for the unit has not been tripped. Make sure the emergency shut-off switch near the furnace is 'on'.

Clean the outdoor coil of your condensing unit with a hose at least once a year - make sure the unit is turned off at the breaker BEFORE doing this. Clean coils will lessen the stress on the compressor, as well as help system efficiency.

Lastly, call your contractor with any questions or needs you may have. Remember, the few minutes you spend preparing your system each spring and fall may mean the difference in the number of years you are able to enjoy the comfort it can provide.