Driving in snow and ice is a serious matter, and winter storms can strand drivers for hours before help can arrive.
If possible, wait until plows have cleared the way. If you must drive in snow and ice, completely clear snow and ice from your vehicle before moving. Clear all windows, but don't use wipers on an icy windshield - ice can cut the blades.
Avoid spinning the wheels. Clear an area around your tires and use an inexpensive, clay-type kitty litter to improve traction. Stopping on snow and ice may require up to 10 times the distance as stopping in normal conditions. Keep plenty of distance between you and the vehicle in front of you. Most importantly, don't "lock up" the wheels. [ABS brakes are specifically designed to help prevent wheels from locking.]
In snow and ice, slow down; avoid sudden maneuvers. Try to keep moving and keep your wheels from spinning, no matter how slow you must go to do so. Use tire chains where allowed by law. When driving downhill, use a low gear and let the engine help you keep the car in control.
Remember that overpasses and bridges freeze before other pavement. Even if it seems warm enough for ice to melt, it still can be hazardous.
If you begin to slide, don't slam on the brakes. Simply ease off the accelerator, then gently apply brake pressure and steer in the direction you want the car to go. Be ready to correct for a slide in the opposite direction.
If you become trapped during a blizzard, DO NOT leave the car unless help is visible within 100 yards. It is easy to become disoriented and lost in blowing, drifting snow and white-out conditions. Always carry a cell phone and call for help as soon as you become stuck.