When you have house sound and techs, you live and die by them. Opening for a national act or other headliner is always interesting too. Especially if their sound guy is using you for set up. If you sound too good they WILL put you to death.
+1 on the no booze or weed and anything during a show. It's only 3-4 hrs. Do that stuff on your own time that's fine but this is a group effort.
I bought one of these it has helped me a lot....
