Prep for the booth. When you call to book your booth let them know this your first time exhibiting and ask them to help set the expectation. They are always willing to give advice to help make you successful. You can look at the trade show's website to see pictures of previous years to get a visual of what to expect for the booth exhibit styles.
Prep for the show. In addition to an awesome booth setup you will need to have a catalog or brochure to hand out. It is important that it include all the relevant information about the items like cost, dimensions, shipping information etc. Again, you can look at the catalog of others attending the show to get an idea of what you need to include. I also recommend you have a notebook, pen and stapler handy. I staple business cards down the outside edge of the pages and write next to the card what was discussed and any action that needs to be taken if necessary after the show.
Prep for the day. If you are not sure what to wear, as shows are different, this is something you can also ask the rep from the show. No matter how you dress, wear comfortable shoes! Bring water bottles and easy snacks so you don't have to leave your booth a lot.
Final thoughts. You can launch at a show with just prototypes and take pre-orders. This is a great way to build revenue, get feedback and gain confidence in your business before you ramp up.