The refrigerator is one of the biggest energy hogs in the house, so it's key to make sure it runs efficiently to save electricity and money. If you don't use your automatic icemaker often, consider turning it off. A study by Time magazine found that the average icemaker increases energy usage by 12 to 20 percent. By simply turning it off, you'll significantly improve efficiency. Want ice? Consider filling silicone ice cube trays with water and using them instead of an automatic icemaker.