Caulk windows, doors and anywhere air leaks in or out. Do not caulk around water heater and furnace exhaust pipes

Set the furnace thermostat at 68 degrees or lower, and the air-conditioner thermostat at 78 degrees or higher, health permitting. 3 percent to 5 percent more energy is used for each degree the air conditioner is set below 78 degrees.

Use compact fluorescent lamps. You can lower your lighting bill by converting to energy-efficient low-wattage compact fluorescent lighting and fixtures.

Replace old windows with new high performance dual pane windows

Clean or replace furnace and air-conditioner filters regularly, following manufacturer's instructions

Wash only full loads in a dishwasher and use the shortest cycle that will get your dishes clean. If operating instructions allow, turn off the dishwasher before the drying cycle, open the door and let the dishes dry naturally