10. Understand that "no" means "no". When we tell you not to do something, when we ask you not to do something, when we implore you not to do something, you shouldn't do that thing. We aren't humourless and we aren't saying "no" just to spite you, we're just looking out for your safety, your happiness, and the theatre's bank account.
10. Respect our stuff. Yes, I have a toolbox that contains all kinds of goodies. (Cough drops! Pencils! Power tools! Teabags! Ice packs! Breath mints! Tape! Oh, such goodies!) And, yes, if you ask me for any of these goodies, I'll probably let you have them. This does not mean you can take it upon yourself to rifle around in my kit, nor does it apply to my stuff more generally.
10. Don't flake out. We will go to the ends of the earth and back again in order to support and accommodate you and make you feel happy and comfortable about the production, but please remember that we have an entire show to worry about, and any time we spend on you is time that isn't being spent on something else. Ask for support, by all means--but if we beaver away on a modification or a reconfiguration or an exception or a change, and you then decide you didn't really need it in the first place, we won't like you very much.