I am doing a show tomorrow. Getting stuff packed up and the car loaded was easy. (Actually, I loaded the car in under 1/2 hour!) The hard part is dealing with the anticipation of having to interact with customers. Will I say the right things? Will I behave the right way? If I say "hello" will they run away from me? Did I forget to put on deodorant?
Getting to sleep the night before a show is always a problem as well. I have found that going to sleep while listening to a guided imagery CD is extremely helpful.
Once I get to the show, the first thing I do is to say hello to my booth neighbors. Although, it is usually prefaced by the question, "What booth number are you?" or "Am I in the right spot?" At least try to get your day off to a positive start. Saying hello to your booth neighbors is a very non-threatening method. Besides, it's always a good idea to make friends with your booth neighbors.
So, start with your fellow artists, and then be bold and say hello to your customers. And, as always, smile and have fun!