Sweating could lead to a chill and even hypothermia. Cover all exposed parts of the body. Build a fire for heat and to attract attention. Do not eat snow as it will lower your body temperature. Melt it first.
Disorientation occurs quickly in wind driven snow and cold.
Start the car and use the heater for about 10 minutes every hour. Make yourself visible to rescuers. Turn on the dome light at night when running engine. Raise the hood indicating trouble after snow stops falling. As you sit, exercise from time to time by vigorously moving arms, legs, fingers, and toes to keep blood circulating and to keep warm.