Insulate.

During winter you want to stay warm -- well, so do your pipes. Add insulation to attics, basements and crawl spaces. Seal up cracks and openings along the perimeter of your home where cold air can blow through and cause pipes to freeze. Insulation will maintain warmer temperatures in these areas and help lower heating costs. Be sure to check for exposed water lines in unheated areas and consider installing specific products made to insulate water pipes, like an insulated pipe sleeve, heat tape or similar materials.