Go over your inventory and make plans for your 2019 fairs. What do you need more of? What requests did you have from your customers that you might consider creating?
Get your vehicle ready for the miles ahead. Take it to the garage for an inspection. Take everything out and clean it. Make sure your miscellaneous supplies are sufficient: clamps, weights, bungees. Rearrange the contents for most efficient loading, unloading.
Analyze your 2018 sales to reevaluate your price points and plan work for the best ones. Then create great work that will fill any voids.
Prepare images for jurying. Analyze and review your portfolio. Share your images with a friend or a person who you respect for feedback. Post them here also for an even large audience.
Plan your 2019 show schedule. Do not apply to vanity shows that you aren't ready for, or that are so far away that your travel eats up all your profit. Do not overlook events that are close at hand where expenses will be low.
New to the business? Do not overextend by buying expensive equipment or applying for events far away until you know you can make a profit. See if you can find a local farmers market or community event now to try your display and shake out the wrinkles for selling, find out what people like about what you are creating.
Review all of your insurance. Really boring, but necessary. Investigate policies with ACT Insurance that specializes in covering artists at art fairs. How is your vehicle insurance. No vehicle/no show. If you don't have AAA insurance, buy it now. The cheapest most helpful auto help around. (They towed our van from the freeway to the Winter Park Art Festival once upon a time.)
Review your business cards. Review any handouts you share at the shows. Does their design reflect your current work? Need cool logo? or other inspiring ideas? My favorite "go to" places are Fiverr.com for quick updates to logos (cheap!) and Logonerds.com for creative help. They designed the banner at the top of this site. I used Canva.com to design that cover for the Best Art Fairs ebook there on the side of this site.
Do your end of the year bookkeeping. Review and apply for state sales tax licenses for your upcoming festivals.
As you might imagine: do not neglect updating your website. Click here for solidly helpful tips.