Recognize that by venturing out into the cold, you are risking frostbite. Stay mindful of the risk. Keep a close eye on the weather wherever you go into the wilderness, and adjust your plans as necessary to avoid the risk of frostbite. Frostbite can strike in any season, especially in the high country. Make sure you have clothing that will not lose its insulating properties when wet.
Dehydration is a predisposing condition for frostbite and hypothermia.
Eat plenty of food, especially carbohydrates, which are quick to digest and easy for your metabolism to turn into heat. Eat small amounts frequently rather than large amounts infrequently. Set a reasonable pace when engaging in vigorous activities. Exhaustion can make treatment and even recognition of frostbite more difficult. Pack a small camp stove, along with fuel and at least one pot, in case another injury is involved and you can't move the frostbitten person.