I answered higher up, but sunscreen (I use mineral sunblock but the Korean chemical sunscreens are really good too) in the morning, and Retin-A (prescription 0.1%) at night are for sure the two best things you can do to keep your skin in good shape. Consistency really pays off. Even if you sometimes forget the sunscreen - putting it on day after day with a few misses is better than using it only when you think you need it.

Men's face skin is slightly thicker than women's but otherwise the same, and superficially the same.