Honestly, I just try to drink lots of water and get a decent amount of sleep!
You can't control the paparazzi. But if you go to Coachella you're going to get photographed. Whereas if you're at home, walking down the street you probably won't. It's something I've learnt to navigate my way around but I try to keep my private life private.
I am certainly not perfect. I don't think you should try to be perfect for anyone. When you come to terms with that, then you're OK.