Go and see what you want
This might seem obvious, but it's all to easy to get swept up in the hype and go and see an artist that your friends, people you've met at the festival, or the press, are all talking about. But don't do it. Go and see exactly what you want, even if it's at a stage with only five people. Ignore your friends telling you you've just gottt to see Major Lazer and go see that folktronica band you secretly love instead.
You'll be so much happier.