sanjose408 said^ what do you use?
For starters, sunscreen!!!! That's the most important thing you can do to prevent wrinkles and age spots. I like Olay SPF 15, but I'd use something a lot stronger if I was going to be in direct sunlight over the noon hours, like Copertone Sport SPF 50.
Second, I like to moisterize my skin. For my body, I prefer St. Ives. It's cheap and I go through a ton of it. For my face, I try all different brands and change it up regularly. If I were you, I'd start with Olay Regenerist Serum. There are also department store brands, but they're way pricier and I really don't think they work all that much better. The secret is to use a lot of it. Don't expect to put one drop on your whole face. Use tons of it (your skin will love you for it) and gently massage it into the skin.
Next, you are what you eat (and drink) so don't eat fast food and get drunk every night. Take a daily multi vitamin, green tea extract, and try to cut down on sugar. Eat foods high in vitamin C, like red bell peppers. They are nature's botox, according to Dr. Oz.
Exercise, particularly with free weights, because muscle tone will fight gravity. Avoid running. (Have you watched runners in slow motion and noticed how their faces look like jelly? Well, they're causing damage and wrinkles. It sucks, I know. I used to be runner in high school. Try biking, instead.)
Don't overwash. Some of your skin's natural oils and layers are actually protecting you. So, in the dry winter months, don't get excessive with the soap. Just take a whore bath (crotch, pits and ass, lol).
Finally, sleep. You said you don't sleep enough. The time you think you're saving will probably come back to bite you later, because your body needs sleep to heal from the day's wares. Make it happen.
Anti-aging is easier than people think. Don't listen to anyone who says you're being vain, or falling for snake oil. Your skin is your biggest organ, and like anything else, it'll last longer if you take good care of it.