According to the American Council for an Energy-Efficient Economy, the average household spends more on water heating than any other energy cost besides heating and cooling. That water heater tank hidden in your closet or down in your basement is working non-stop to keep the water warm and to heat up the cold water that refills it after each use. You don’t need to switch to cold showers to save money—you can reduce your costs greatly by taking a handful of simple steps.

A simple way to reduce home energy costs is to use your existing window blinds to help maximize your comfort, changing and adjusting them with the season. In the winter, open the blinds on the windows that face south to let some sunshine and heat in during the day, and then close them at night. In the summer, be sure to keep the blinds and curtains on the south side of your house closed to protect against the sun’s rays heating up your otherwise nicely air-conditioned interior.

Electronics and miscellaneous appliances are the second largest category of home electricity usage — nearly $200 for the average household. “Phantom power” or situations where these devices are using electricity even when you think they are “off” are the reason. Often (but not always) that little green light that is still glowing is a tip-off.

In most homes, the attic door or hatch, is a framed plywood square in the ceiling of a hallway or bedroom, with no insulation above it. Without insulation, it is like having an open door to the outside or an open fireplace flue.