Lower water temps and humidify
It takes more energy to heat water in cold weather. You can lower the temperature of your water heater a bit and still get a hot shower, and use cold water to do laundry and rinse dishes. The ideal temperature for a residential hot water heater is 120 degrees, NStar said.
According to Joseph C. Wood of Boston Standard Co., maintaining proper humidity with a whole-house humidifier can improve your home’s comfort level and help you fight the urge to crank up the heat. A home with proper humidity control feels warmer at lower temperatures because it slows the evaporation of moisture from your skin.