Danielellis, CONGRATULATIONS on getting the job! It sounds like loads of fun, but always be careful, and learn from others' mistakes, so that you don't have to make them!
As stated already, it is always good to be prepared for a variety of possible "situations" that can arise during restaurant work, and maturity plays a big role in the ability to deal with those incidents in a professional manner.
I am finishing up scripting and rehearsing my sets, and writing my contract so that I can finally begin to work in a restaurant!
To anybody that is thinking about working in restaurants: TAKE THE TIME TO WRITE A CONTRACT. It will ensure that you don't get "jipped" or "taken advantage of" by the establishment's management, and it will straighten out possible liability issues.
Once I get another set scripted and rehearsed (my fourth), and my contract is finished, I will be out and about delivering business letters and business cards to restaurants! It should be quite an experience.