When I'm shooting and find I want to keep notes I always write on the polaroids then staple it to the proof sheet. I also keep printing notes and attach those to the proof sheets. For the most part though while shooting, being in the moment, seems to be enough to bring back the memory for the details of the circumstances while pursuing the shot. Unless I'm testing, note taking is a distraction. Each shot I take I do save the final polaroid and attach it to my print work sheet. Being involved in absolute detail for me does not give me the freedom to be in the moment.