Having you HVAC system checked out by a technician, have him service the unit twice a year, once in the spring and once in the fall for optium performance when you really need it to perform in the coldest of winter and hottest of summer.
Windows and doors need to be sealed by caulk and new weather stripping, to insure gaps are sealed.
Reverse you ceiling fans so that they blow down for winter, so that the heat that has risen will be blown down.
Bring in hoses and cover the outside faucets.
Replace air filters every month, dirty filters make the unit work harder which amkes for a higher fuel bill.
Lower your thermostat to save on heating cost to 68 degrees or lower
Smoke alarms need to have the batteries replaced.
Questions about selling, buying or investing in real estate in the Murfreesboro, or middle TN area please call me at 615-785-3563 Todd Taylor