Photograph from chippenziedeutch on Flickr

Finance blog The Simple Dollar has seven tips on how to get the most out of your refrigerator and freezer for less money. For example, cleaning the dust off the coils at the back of your refrigerator will make it more energy efficient. Also, if your freezer is fairly empty (unlike the one above), fill it with empty jugs of water to keep the other items cold and make your freezer work less hard. If you're really hardcore, you can build a chest refrigerator, which cuts energy use by about 90 percent over a typical standup refrigerator.

Related: Serious Green: 10 Cheap & Green Kitchen Tips