Here is some very valuable information on figuring out some "shopper psychology" . Look a little deeper into your work, booth displays, and more.
A super quick summation of what she believes is as follows. Read her blog for the full story. These tips written by Carolyn Edlund.
1.) Make them feel uniquely special.
2.) Offer lots of information.
3.) Customers need to be involved in the decision.
4.) Tell the story.
5.) Provide a high level of service.
I found this very interesting post here.