1. Start a fire. 2. Mummify your human with a minimum of 5 layers of bandages, preferably more. You want them to be well-insulated so as to trap body heat. 3. Give them lots of cuddles. The more, the better. 4. Repeat every night until winter is over. 5. Repeat every night until winter starts again. 6. See step #1 and repeat until the end of time.