Editor's note: This is first guest post from Jon Reiss.

Let me clarify some of my feelings about the PMD. I will add my universal caveat that every film and situation is different. But here are some important guidelines:

1. The best case scenario is that a PMD is on board as a full collaborator and worker from as close to inception of the film as possible. No later than beginning of prep. This allows for, what I feel, the optimum of the integration of audience connection and engagement (which is what distribution and marketing is at its essence). If you wait till you have finished your film – you are in a world of hurt (I’ve said that before, but I don’t think I can say it enough) because this connection building and engagement take time and effort and cannot be hurried.