Energy efficient washing machines & dryers

The New York Times has an amusing short video about energy efficient washing machines. Washing and drying can use a substantial fraction of the home's energy, so cutting back here is important. Front loading washers use less water (and energy) than top loaders, and may lengthen the life of your clothes. Energy Star washers use about half as much energy as normal washers. The Energy Star site has tips here, and links to lists of qualifying washers.
Dryers are not Energy Star rated, because there is little difference among them, but the more sophisticated dryers will carefully calculate the heat needed. But nothing beats hang-drying for low energy use! If your towels are too stiff after hang drying, you can briefly fluff them in the dryer.