Here’s a little walk-through of my drawing process.
This method, I’ve found, is kind of similar to working on real paper, in that you make a light under-sketch, and then define, and erase lines as you go along. Drawing is re-drawing, and this method helps me pull-through when I think I should be making awesome shit on my first attempt, when in fact what you should be doing is just polish, and work on a thing until it stops looking like you have never seen a thing.
Some students have asked me why I don’t just do my clean-up on a separate layer. I mean, I guess you could do that, but for some odd reason, I feel like my clean-ups are more successful when I draw right on top of my sketch layer.