Lots of lip balm during winter is key. I lived in North America for some time before and was really shocked to find myself using up tubes of lip balm in just one month! I never had to use any here in the Philippines because our climate's quite warm. But after relocating for a while, applying lip balm every hour was not only a necessity but a skin-saving habit I had developed. For dry skin, petroleum jelly at night is a good yet cheap solution. It's really sticky and thick so it's best to put on gloves or socks over jellied hands and feet.