11) Plant a tree. One well-placed shade tree can reduce your cooling costs by 25 percent.12) When planting trees, place leafy shade trees to the south and west, and evergreens to the north.13) As if it wasn't already obvious, use CFL light bulbs in your home. Get them for under a buck if you buy in bulk.
14) A ceiling fan should blow air down in the winter and up in the summer.15) Set the fan on your central air conditioner to "on" rather than "auto." This will circulate air continuously, keeping the temperature more even throughout the house and aiding in dehumidification.16) Make sure your window air conditioner is the proper size.17) Vacuum registers and vents regularly.18) Raise the thermostat to about 78 to 80 degrees whenever you go to bed or leave the house.19) If your home can't accommodate central air conditioning, try a whole-house attic fan.20) During the winter, remove window air conditioners and seal the windows with caulk and weatherstripping.
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