Buy ENERGY STAR qualified products, which are the most efficient computers, printers, copiers, refrigerators, televisions, windows, thermostats, ceiling fans and other appliances and equipment.
Turn off machines when they are not in use. Automatic switching to sleep mode or turning computer off is a great energy-saving strategy.
To maximize savings with a laptop, put the AC adapter on a power strip that can be turned off (or will turn off automatically).
Use a laptop; they use less energy than desktop computers.
Unplug battery chargers once the batteries are fully charged.