D.B.
If it is for a church fundraiser, many churches will publish craft fairs in their bulletins or post it on a bulletin board. Post it at your child's daycare or, if in school, see if teacher(s) will allow a flyer to go home with the children for their parents to read and especially if the school has a newsletter. I also provided all the vendors participating in the fair with a stack of flyers and asked them to pass it onto their customers. In the flyers, I also posted a complete list of the vendors along with their specialty items. Also, large, brightly colored signs (neon are best) directing people to your fair. Sometimes the Suburban Journals will offer discounted ads for craft fairs depending on the organization. E-mail a flyer to all your friends and ask them to e-mail it to all their friends. It is amazing how many people you can reach via the internet. Good Luck!!