Dry, frigid temperatures and indoor heating strip skin of its natural levels of moisture. Instead of slathering on layers of lotion, try this more strategic fix: Apply a moisturizer made with humectants (such as hyaluronic acid) during the day and one with occlusive ingredients (like petrolatum or shea butter) at night, suggests Fredric Brandt, MD, a dermatologist in New York City. Humectants are lightweight -- ideal for daytime -- and draw moisture from the deep layers of the dermis to keep skin soft, Dr. Brandt adds. Occlusive formulas, on the other hand, form a physical barrier that locks in moisture. Apply both to damp skin (either just-washed or spritzed with a hydrating mist), which attracts moisturizing ingredients like a magnet.