Air leakage is a common source of high heating bills.
Use caulk, weatherstripping and spray foam to seal gaps and install covers to prevent air leaks around outlets. Have your heating ducts sealed by a professional.
Get your attic, garage, basement and crawlspace inspected and install more insulation if necessary.
More energy-efficient windows and doors can also keep your house warm. If you can’t afford new windows, use insulated drapes.
Have your HVAC system inspected and serviced every year. Replace the furnace if it’s worn out and inefficient.
Use a programmable thermostat to adjust the temperature in your house based on your family’s schedule so you don’t waste energy.