1) Make sure all items are tagged. Some shoppers may feel uncomfortable having to ask for the price. I purchase the business cards and tags I use at shows on ETSY.
2) If you have a smart phone, use a credit card reader. I use Square which offers a free reader when you sign up.
3) Have items in a wide price range to appeal to a variety of shoppers. I usually have a bowl of earrings that are $10 or less which is always fun and popular.
4) Create a display with a cohesive design that represents the 'look and feel' of your product. I use a solid suede-like piece of fabric as my table cover. It’s a nice shade of brown which looks good as the backdrop to my jewelry. I stay away from prints because my items will get lost in the design. I used to use an ivory backdrop but then realized that my items just weren’t ‘popping’. Also try not to be too cluttered, like this picture from my first craft show:
5) Group 'like' items together if you're selling jewelry items or something similar. I'll display my items in groupings by color or gemstone .... that way if someone is interested in a turquoise necklace, they'll see a complimenting pair of earrings or bracelet.
7) Make your displays! You don't have to spend a lot of money. Here's my post from earlier this year with DIY instructions for an earring display: DIY Earring Display
9) Be approachable! Don’t stay seated behind your display. Take time to go in front of your table and tidy up your displays... and chat with customers while you're there. You can be friendly to customers without being over-bearing or pushy.
10) Good luck and most important, have fun!