Use lots of sunscreen and rub it in well. Put the sunscreen on 30 minutes before you go outside. Put the sunscreen everywhere the sun's rays might touch you, including your forehead and face, your ears, the back of your neck and any bald parts on the top of your head. Some sunscreen products say they won't drip into your eyes. You can try those products on your face if that's a problem for you.
Some doctors think it's a good idea to do a monthly skin check.
Ask your doctor about this. If your doctor thinks it's a good idea for you, pick a certain day each month, like the date of your birthday or the day you pay bills, to check your skin. A monthly skin check can help you find skin cancer early. The earlier skin cancer is found, the better the chance for a cure. When both sides of a mole don't look the same.