One word - sunscreen. The sun is the #1 thing that ages your skin - constant exposure to the sun without protecting your skin with an spf causes wrinkles, dark patches of skin, age spots, etc. It's called photoaging and it happens to all ethnicities.... (white europeans will be more prone to wrinkles/fine lines, asian / african skin will be prone to age spots and uneven skin tone)
It's hard to get rid of once your skin is damaged in this way, so the best thing to do is protect with an spf!