Caulking and weather stripping your home saves money, energy and resources. Start at the top and work down:
Attic: caulk holes in the attic floor and walls; doors and hatches to the attic; plumbing stacks; and attic knee walls/storage drawers.
Main level: caulk around the chimney and fireplace dampers; around the windows; doors, trip and baseboards; electrical outlets and other exterior wall holes.
Basement: caulk around the sill plate and band joists; basement windows; duct/furnace ducts; opening in the basement ceiling and other holes.
Install weather stripping and door sweeps to stop air from escaping and to reduce drafts.
Replace old windows with high-efficiency ones. Use window kits for weatherization.
Programmable thermostats can increase the comfort of your home and improve its energy efficiency. Be sure the thermostat is not obstructed or placed in areas susceptible to drafts. Set the thermostat at 65 to 70 degrees in the winter, and slightly lower at night.
Invest in an energy efficient water heater. If your water heater was installed before 1990, consider wrapping it in an insulated blanket, but be sure not to obstruct the vent pipe.