Stay in the shade, especially between 10 AM and 4 PM.
Do not allow your skin to burn.
Cover up with clothing, including a broad-brimmed hat (not baseball cap) and UV-blocking sunglasses.
Use a broad spectrum (UVA/UVB) sunscreen with an SPF of 15 (or higher) and high star rating every day. For extended outdoor activity, use a water-resistant, broad spectrum (UVA/UVB) sunscreen with an SPF of 30 or higher.
Apply plenty (2 tablespoons) of sunscreen to your entire body 30 minutes before going outside. Allow to dry. Reapply every two hours or immediately after swimming or excessive sweating.
Keep newborns out of the sun. Sunscreens should be used on babies over the age of six months.