Short lesson: Make more fan art.
Long lesson: Make more fans.
My last-day Catra print sold and started good conversations but the art I showed of my own characters and places didn't fly so well. The problem was a combination of my lack of glitzy display and the fact that nobody knows who my characters are. Most fans aren't looking for "art" -- they're looking for topics and characters they already love.
So my challenge over the next year is to make my characters more known and well-loved. (And to draw a lot more fan art, too.)