I've been reading as many articles and posts as possible in preparation for my first 3 craft fairs, and I've compiled a giant list of things to bring (aside from your items + setup stuff, which I hope is obvious.) Here it is! Please add if you don't see something listed.
-credit card accepting things if applicable
-lots of extra change (1$s and coinage)
-Notebook to Sign Up for Mailing List
-photo album of work sold
-prices for everything
-wear my items
-tempting basket of free candy
-other crafter's freebies/promo packs
-bags for people who make purchases (paper, staples?)
-Bring something to work on while you sit behind the booth. Doing your craft on the spot draws in customers.
-Have different levels on your display.
-Bring a CALCULATOR for sale totals
-small plastic bag for trash
-bring extra lighting
-CLIP ON BACKS and needlenose pliers for jewelry, just in case of requests or repairs
-receipt slips or papers
-tape, paper, pens, scissors
-mirror for jewelry or clothing
-Sign up sheet for mailing list or custom orders
-Writing pens for customers to write checks
-Notebook to note who bought what, payment type & price
-paper towels/baby wipe/purell
Please let me know if I've missed anything!
I found another great link here http://sunshineglassworks.com/articles/craftshowlist.shtml
(Ps - the picture is of jewelry I made over spring break to take to my shows, so it's not TOTALLY unrelated. I think it's an awesome pic though!)