What's the ONE best piece of advice you can share?

Be kind.

These sound like good pieces of advice for life in general! Love it!

don't sweat the little things

Remember :

We can run, but we can't hide from it. Of all possible worlds, we only got one, we gotta to ride on it.

Wear sunscreen. If I could offer you only one tip for the future, sunscreen would be it. The long term benefits of sunscreen have been proved by scientists whereas the rest of my advice has no basis more reliable than my own meandering experience.

Don't leave the stage! Last year it felt like every person that got up there brought out a special guest and sang a song you didnt see coming. Sweet emotion and use me with sci and zac brown, hell even furthur and zac brown, i mean who saw that coming? Or that badass box of rain on su day with furthur jimmy herring and susan. DONT LEAVE THE STAGE

Sure!

if your going to be dumb, you better be tough

In alcohol's defence, I've done some pretty dumb shit while sober too.

my one piece of advice would be to remember that we are all one big happy family when we are there. for the most part, you can rely on your neighbor if you need help. there really are no strangers at a festival like this. in my experience, even the bro-est of bros is willing to help at a festival.
if you need help, ask for it. i guarantee there are AT LEAST ten thousand people that will jump at the chance to help you out.