Take a look inside your freezer: Is it full or half-empty? If it's the latter, fill a freezer bag or two with ice. Bags of ice cubes in the freezer take up space and help keep the overall freezer temperature down. The colder the freezer, the less energy it uses to maintain the appropriate temperature. Even filling old ice cream containers with water and letting them freeze into blocks of ice can go a long way to improve your freezer's efficiency.
ANDREWS MCMEEL SYNDICATION