For SEVERE dry skin during the winter the only thing that works for me is Eucerin
You can obtain it in any target and many grocery stores carry it. Take a hot shower, dry yourself off, and then immediately apply eucerin intensive lotion ALL over your body. This will help lock the moisture in.
For your face, exfoliate with something like St. Ives apricot scrub while showering.
Then coat your face in a good quality Aloe. You don't want to use Eucerin on your face, it is too strong and could lead to acne. I use JASON Aloe Vera that you can find at Whole Foods.
Vitamin E can help sometimes, think about taking Fish Oil supplements. Keep hand lotion with you at all times to treat your hands.
Your feet may be especially dry. For that I use the big guns: Burt's Bees Hand Salve. This stuff is for the most severe of dry skins areas.
Hope any of this helps. All this advice is for SEVERE dry skin, for most people this type of moisturizing is too strong. Eucerin is too strong for most people's skin.
For severe dry skin avoid water-based lotions. (thats almost all of them)
As was mentioned previously, a humidifier at home will help your skin as well.