Monitor your moles by examining your skin carefully, including areas of skin not exposed to the sun, on a monthly basis.
Avoid tanning and do not use UV tanning booths.
Avoid or prevent sun burns.
Use sunscreen: a broad spectrum SPF 15+ sunscreen that has coverage for both UVA and UVB. Apply 1 ounce (2 tablespoons) of sunscreen to your entire body 30 minutes before going outside. Reapply every two hours—more frequently if in water or sweating.
Seek shade, especially at times of peak sun between 10 AM and 4 PM.
Cover up with clothing, including a broad-brimmed hat and UV-blocking sunglasses.
Have your dermatologist examine your moles and provide a periodic skin cancer screening.