If you can't be bothered with moisturizers (which I still would recommend -- a basic one for the body and face), the only thing you can do is drink more. How much water do you drink a day?
If you work in an office, keep a water bottle by your side and take a sip every ten minutes or so. Keeping properly hydrated may have a positive impact on your skin.
EDIT: The aloe vera juice flowerz mentioned, as crazy as it sounds, has many skin benefits. Though a moisturizer, again, would be your best bet. :tongue1: