4 things to keep in mind when you are booked for a modeling job:
Expect to be booked all day meaning do not plan anything else that day, at least until 6pm. Sometimes shoots could be longer.
Expect a stylist but bring some heels, bring a backup outfit if you can.
Whether it is a beauty job or hand modeling gig bring your own makeup, polish, etc, "just in case."
Bring lotion, bring hair clips, and flipflops or comfort shoes when you are off set.