I dont usually look into this forum, but when i found this book on the Google Book Search I just couldnt keep it to myself!
Its a book thats been digitised as part of google's moving libraries online, and although (since it was only published last year the copyrights nowhere near expiring) you can only see a preview of the content it still looks pretty interesting. It gives advise about identifying your customers, pricing and choosing the right craft shows.
Here's the link...
I know its a long one but it'll take you right to it, just click the arrows to flick through.