In high-rise buildings, go to interior small rooms or hallways on the lowest floor possible with no windows. If you can see outside you are not safe. In vehicles and mobile homes, leave them and go to a substantial structure. If there is no shelter nearby, lie flat in the nearest ditch, ravine, or culvert with your hands over your head and neck. Layers of protective clothes are more effective and efficient than a single layer of thick clothes.
Mittens are often warmer than gloves.
Cover the mouth to protect lungs from extremely cold air. Maintain a full tank of gasoline to keep moisture out of the tank. Carry a winter kit containing equipment to help keep you warm, visible, and alive if you are trapped in a winter storm. If a blizzard traps you in your car, avoid overexertion and exposure, turn on the dome light at night, and don't panic. Don't overexert yourself shoveling snow.