Most of my drawings start off as a simple sketch, some have started off on a bar napkin, piece or receipt paper, whatever. If I like the sketch, I make a photocopy of it, resizing if necessary. Then I trace my sketch onto another sheet of paper on a transparent clipboard, with the screen of my iPad lighting it up from below. As I'm doing this, I am also making improvements and adjustments to the original sketch. I trace softly with pencil until I like what I have. Then I put down the strong pencil lines that are harder to erase. Not sure what you draw, but this works for me and all the absurd images I like to create.