The best thing I've learned is if you're going out never go out alone - you leave yourself vulnerable. If you've got someone else there you trust they can say be wary of that person. I probably used to be too trusting of people.
You go to a show and there's no food at all so if you're doing shows back to back you can forget eating. I remember standing up in the bath one day and there was a mirror in front of me and I was so thin! I hated it. I never liked being that skinny.