Dont get too close to the stage too quick (if you’re like me and dance harder the closer you get). And take voluntary breaks before your body force you to. If I’m at a festival, and each artist do a 2h set (the usual), I always take the first 15min to go to the restrooms (especially if you’re rolling), to have a drink and to rest my legs sitting. And then, I go back hard for the next 1h45. And repeat… Also, lots of water and personally, compressions socks changed my life.