#1 Turn down the Thermostat–You can save as much as 10 percent a year by turning your thermostat back seven to 10 degrees for eight hours a day.
#2 Seal up your house to keep cold air out, and warm air in–Calking and weather stripping help seal your house up. You could save about 7.5 percent on your energy bill.
#3 Change your furnace filters regularly–A clean filter costs about $20 and can lower energy use by as much as 7.5 percent.
#4 Get a pro to test your energy efficiency–According to Energy.gov, an energy audit can show you ways to save five to 30 percent on your utility bills.
#5 Get free heat from the sun–Warm sunshine can heat your home for free! Open curtains on south-and west-facing windows during the day to warm your interior rooms and surfaces.