USE A HUMIDIFIER Moist air feels warmer than dry air, so run a humidifier when the heat is on, suggests Anne Marie Corbalis, spokesperson for Con Edison. (This will also reduce pesky static electricity.) PLUG DRAFTY SPOTS Feel for drafts around pipes, doors, windows, and electrical and cable outlets, says Corbalis. Inexpensive draft blockers and outlet sealers can fix many problem areas. DON’T FORGET THE DAMPER When your fireplace is not in use, close the damper.