Drink plenty of water to help cool off your skin.
Take an anti-inflammatory
Take some ibuprofen, which will block the formation of chemicals that cause redness.
Chill a thick moisturizer on the fridge or freeze some Aloe Vera Gel in ice cube trays. The cold moisturizer will ease the burn and the aloe will vera provides extra reflex by reducing inflammation.
Moisturize the moment you notice the burn to stop your skin from peeling.
Try this homemade recipeSunburn-recipe