I did Inktober this year. Noticeable improvements from the last time I did this in 2017: better use of volumes, more expressive and varied characters, more unusual and interesting compositions. Using just one sketchbook helped; my art supplies are better,my use of them more controlled.
Thumbnailing was important, as last time. Every day, I became a little more ambitious and had to try out sketch after sketch before hitting on the exact right feel. Each day, the drawing took longer to complete. I think that work shows in the final pieces.
Unlike last time, I feel have the technical skills for drawing a comic now. Maybe when the ideas start coming again.