Wherever he goes, he should try to think, as much as possible, about things that have absolutely nothing to do with the film. It is difficult, but it is necessary to create a barrier, a cellular wall between shooting and editing. Fred Zinnemann would go climbing in the Alps after the end of shooting, just to put himself in a potentially life-threatening situation where he had to be there, not day-dreaming about the film’s problems.

Then, after a few weeks, he would come down from the Alps, back to earth; he would sit down in a dark room, alone, the arc light would ignite, and he would watch his film. He would still be, inherently, brimming with those images from beyond the edge of the frame (a director will never be fully able to forget them), but if he had gone straight from shooting to editing, the confusion would be worse and he would have gotten the two different thought processes of shooting and editing irrevocably mixed up.

Do everything you can to help the director erect this barrier for himself so that when he first sees the film, he can say, “All right, I’m going to pretend that I had nothing to do with this film. It needs some work. What needs to be done?”