Christmas fair countdown tip
Collect email addresses
While meeting and chatting with people is undoubtedly a highlight, it is also a massive marketing opportunity. You can use it as a way to gather email addresses from interested parties and then keep them updated as to new products via newsletters.
You don't need anything fancy. Either print out forms for people to fill in, or ask customers if they would be interested in receiving newsletters in the future.
To sweeten the deal, you could set up a draw, where people have to email an address to be in with the chance of winning one of your items. If you do this, be sure to include an opt-out clause for if people do not want to receive further information from you.
While you are unlikely to gather thousands of addresses from one fair, over time you can build up a decent database for very little effort.