If you simply must have a fireplace, remember to always keep the damper shut when the fireplace is not in use and use a glass cover you can seal tightly to further block the opening to the fireplace from your living space. Fireplace plugs, which can keep out drafts during the season when fireplaces are not in use, may also be a worthwhile investment.
Outlets and light switches can be significant sources of drafts in a home. Check to see that the switch plates are secure. If drafts still come through, then employ outlet draft blockers to prevent cool air from entering the home and warm air from exiting it.
Homeowners can address drafts in a variety of ways. And doing so can make a home more comfortable and cut energy costs considerably.