Keep your gas tank full. It may be necessary to change routes or turn back during a bad storm or you may be caught in a traffic delay. Keep windshield and windows clear. You may want to stop at a safe turnout to use a snow or, ice or scraper. Use the car defroster and a clean cloth to keep the windows free of fog.
Visibility is another big hazard of winter driving.
In heavy snow, keep you lights on. Stop and clean your windshield and lights if necessary. Be more observant. Visibility is often limited in winter by weather conditions. Slow down and watch for other vehicles and for snow equipment.