Blame it on Coco Chanel—before she returned golden brown from a Mediterranean vacation in the 1920s, pale skin was in. But until the Morticia Addams look comes back in style, stick to self-tanning lotion: The sun's UV rays damage your skin's DNA, increasing your risk of skin cancer (not to mention sunspots, sagging skin, and wrinkles). In fact, as much as 90% of wrinkles, brown spots, and sagging are caused by sun damage, according to the American Skin Association.
Break it: Wear sunscreen daily on the parts of your body that are exposed to the sun, even during winter. The skin cancer foundation recommends applying 1 ounce of SPF 15 sunscreen with UVA and UVB protection to your entire body 30 minutes before going outside on a typical day, and then reapply every 2 hours. If you're spending the day outdoors, wear a wide-brimmed hat and cover exposed skin with clothing, preferably with built-in sunscreen.