Answer to comments! That is the biggest one, imo, and try not to take possible criticism too hard or let your feelings get to you. (I was really bad with the latter one because I was in a really stressful life situation and bla bla excuses, it's not okay regardless and all I can do to fix it is to do better in the present and learn from those mistakes)
If you don't get many comments yet, start using the author's comment/description field to your advantage! Make little jokes about something in the update, say something about your life, or say something else to open up a discussion. You could even remind the audience that if they have any opinions on the way your art is developing, they're welcome to voice them. Having a connection with your audience isn't only a nice feeling, but it's also educational for you as an artist.