Just stumbled on some of the thumbnails I'd used in creating the pages of OXYGEN in the current DIGESTED.03 issue.
Through this free brainstorming, I get the camera angles and compositions right before I begin to pencil in the page for inking. (Notice the thumbnails I've outlines in black. These are the ones that I chose for the final panels in the story). I find this prior thumbnailing step is invaluable, rather than trying to compose blindly onto the finished board and then rubbing & re-rubbing until you ruin your paper in a hundred smudges and smears. Basically, I find I can't 'work it out' on the finished art board. It's too constrained for me. The designer in me would much rather 'compose' the page and get it right before I get to the final art board.