An excellent fact sheet from the Commonwealth Department of Health and Aging advises Australians to protect themselves from skin cancer by:

1. Seek Shade
2. Wear sun protective clothing that covers as much of your body as possible
3. Put on a broard-brimmed hat that shades your face, neck and ears
4. Wear wrap-around sunglasses
5. Apply SPF50+ broad spectrum water resistant sunscreen liberally to clean, dry skin, at least 20 minutes before being exposed to the sun, and reapply at least every two hours when outdoors.

Commonwealth Dept of Health and Aging