Take a shower: Taking a shower uses about 1/5 of the energy as taking a bath, and as long as you don’t fall asleep it should use less water too. If not, you can always install a “low flow” shower head to limit the amount of water being used. Unplug your phone charger: When you’re not using it that is. According to the U.S. Department of Energy, appliances consume a significant amount of electricity even when they are switched off. Ever notice how your phone charger can get hot with no phone on it?