Lower your thermostat at night or when you leave the house. Keep doors and windows closed when heat is on. If you have a fireplace and aren't using it, make sure the flue is closed. Consider glass doors to help prevent heat loss when your heating system is on. If you have a heat pump, adjust your thermostat in small increments to avoid the operation of the supplemental heat strip in your system.
Energy consumption is much higher when the heat strip is in use.
A steady setting on your heat pump thermostat produces constant comfort and minimizes the use of the less efficient resistance heat strip. Be sure the filters in your heating system are clean. Dirty filters will increase heating costs. Caulk and weather-strip any leaky windows and doors. Open drapes and shades on the sunny side of your house to help warm the home during the day.