Even with your SPF 8000, you still managed to get a little scorched during that marathon sand-castle session on the beach. Dip some gauze in whole milk and apply to crispy areas for about 20 minutes.
Cool baths are high on the aaahhh list, too.
Eating more foods rich in Vitamin C helps the healing process. You may also want to up your intake of certain supplements for a few days. The aloe vera plant has long been a stand-by for healing burns of all kinds. Keep a plant in your house, break open a leaf and apply the gel inside to the burned areas. Keep your skin thoroughly moisturized to reduce peeling and flaking later on.