PRMama has a great article on Marketing at a convention or trade show. Here is a sample:
Do listen to customer concerns—If a current customer voices a concern, be attentive. Listen carefully to their concerns, ask questions, and do everything you can to resolve the situation and keep the customer. Happy customers make repeat customers.
Do have printed catalogs or brochures for prospects—On the first day of a homeschool convention, many moms and dads are just checking out the convention to see what’s available. They may not make a decision until the next day or even weeks down the road. Give them something they can take home or back to their hotel room. Let them take their time in reading information about your product so they can make the best buying decisions for their families.
Don’t let body language ruin your sales—A friendly smile will draw people to your booth. Be open and inviting. Don’t cross your arms over your chest. This gives the impression that you don’t want to be bothered. When you’re talking to a customer, make eye contact. If you display confidence, they’re more likely to trust you and what you’re telling them about your product.
Check out the other six tips at PRMama.