Are you planning on going on a family vacation? If you are planning on leaving for more than 3 days give your water heater a vacation. Did you know most water heaters have a vacation setting ? If yours does not just set it to the lowest setting possible. Just remember to turn it on again as soon as you get home. Save energy, save money. A reminder when you do turn it back on to set it to no higher than 120* F to reduce to risk of scalding.