Reduce nighttime temperature 5 to 8 degrees or more. Open and close outside doors quickly when you enter or leave your home. During the day, open draperies and roll up shades on windows that face south, east, and west to receive direct heat from the sun in winter. Place furniture so that it does not block heat registers or outlets. Energy lost through air leaks can be decreased.
Caulk cracks around doors, windows, foundation, and the fireplace.
Close door of attached garage in winter. Close the flue when fireplace is not in use. Weatherstrip doors and windows. Lock your windows so they seal tighter. Use kitchen and bathroom exhaust fans only when necessary.