It's starting to get cold out already; Take the chance to winterize your home before it starts freezing.
Look for Leaks
Start in the attic - wait for a rainy day to search for dripping. Use weatherproof caulk to block the leaks, especially around windows and doors.
If celinging joists are visible, you need more insulation; at least 12 inches. In the basement, cover exposed pipe with foam insulation
Reverse the Fan
Reverse the attic fan so it draws warm air up instead of sending cool air down. Remember to flip it back after winter!
Cover the Windows
Since basement and attic windows don't usually have curtains to block the cold air, cover them with plastic.
Cover the Attic Stairs
Cover the stairs with a wooden box, which you can build or get at a home improvement store. Otherwise, cover the hole with a tarp or plastic.
Wipe down the duct work, and cover grooves and joints with aluminum tape or a sealant. Despite it's name, don't use duct tape here.
Replace the Filter
Get a new filter in your furnace. A new filter heats the entire home more effectively
After following these steps, you can now enjoy reduced heating costs and a warm & cozy home this winter season.