Casseroles, roasts, broiled foods, and other dishes don't need to go into a warm oven. Follow the recipe and use the oven light as your guideline for timing. Every time you open the oven to check on your dish, about 25 degrees of heat escape. Turn your oven off about five minutes before the allotted cooking time is up. Leave the door closed to retain heat.
Microwave ovens use approximately half the energy of conventional ovens.
Run your dishwasher only when full. If your machine doesn't have this feature, turn it off manually after the final rinse and let the dishes air dry. Replace worn washers in leaking faucets promptly. Tighten or plug leaking joints in water pipes. These devices reduce water flow to a maximum of three gallons per minute and, in most cases, do not affect water pressure.