Install storm windows, or cover the outside glass with polyethylene sheets.
Make sure your ceiling has at least six inches of good thermal insulation.
Remove dust and dirt from radiators for maximum heating efficiency.
Keep baseboard outlets clear of rugs and furniture.
Correct air leaks around windows, doors and electrical outlets. Repair weather stripping and caulking. (Note: Never caulk storm windows because they may retain moisture, which damages wood frames.)
Seal off your attic circulating fan with polyethylene and tape.
Heating your home may account for 50-70% of all energy consumed. You can save as much as 10% a year on your heating bills by turning your thermostat back 10 degrees for 8 hours every day.