It's probably really important to keep drinking a lot of water too. I could only imagine you're going to feel like absolute ass when you wake up if you are dehydrated.

The last time I got sunburnt, like majorly sunburnt, was a couple of years ago. Stupidly I was stubborn and wanted to go for a bike ride whilst being sunburnt. Let's just say I could barely get my motorbike boots off without screaming like a little girl.