Eric, I always do proof sheets and will dig through and find something. I'm not sure how useful it will be, as most my stuff is concept driven and by the time we get to film the shot only really leaves room for small variations. Polaroid is my tool to weed out the problems in an image then once the shot is complete we shoot film. It may be more interesting to keep all the polaroids from a session to show the changes and compromises through a session them the proof sheets.