Jojoba oil is great for putting moisture back into the skin, as is organic unrefined coconut oil. If you get sunburned, picking an aloe vera leaf, slitting it open, and putting the salve on is one of the best remedies out there.
Once you've sun damaged your skin, there's not a whole lot you can do to "undamage" it. Do you take a good quality Vit E supplement (with EPA/DHA)? Vit E will help with free radicals and should help keep your skin from becoming overly dry and leather like.
Also, if you've developed moles within the last 10 years, I'd recommend you see a dermatologist to make sure you haven't developed any skin cancer. Moles that are new are usually suspect. My mom rarely ever spent any time in the sun sunning, and if she was out in the sun, she always wore a hat. Yet when she reached her 60s, she had a suspect spot on her nose; turned out to be a precancerous spot. She had it removed.