Take a problem and try different solutions. Get in the habit of taking time with a problem rather than trying to skim over it.
Remember to use drawing references! You don't have to process and automatize everything right away.
Use different pen styles. You're using a computer, so take advantage of the different weights.
Practice drawing characters digitally as well as on paper.
Spend some time developing newer characters.
Flow chart- current plan
1 page per day with no planning ---> build momentum ---> formulate ideas while working ---> begin planning during FREE time ---> probably redraw/ rework pages during FREE time ---> planned version slowly takes over? ---> begin publishing
The key is to build momentum and to keep it. Every time I have successfully built momentum in the past, I ruined it during the planning stage. Say I start on a project with little forethought. Usually after a couple of months of drawing I begin developing solid planning and ideas; they aren't FULLY planned and developed yet. I decided that this tighter version of a story is superior and promptly drop the lesser version to continue planning. What then happens is momentum drops completely and I'm back to where I started.
In the past I would conclude that the spontaneous version, while rougher, was the superior over the planned version. While it's true that something is better than nothing in this case, I failed to recognize that a tightly planned work is much more difficult and long range but the end result of such a struggle is most likely going to be far superior to the short range project. And a short range project, which could be translated into a project not necessarily ones own planning wise, is undeniably good for solid work experience, momentum, and discipline.
So to recap, work on a 'daily' version with little regard to plot. Don't work out an outline or do rough storyboards or anything beforehand- just work on one page per day. Once you get going it'll be okay to do some minor planning ahead of time. Eventually I believe that planning will reach a point that I'll be working on a cohesive story that will take a while to work out the details. That's based partly from experience, partly from theory.