Looking over the suggestions it looks to me like an obvious time saver is to have a guidebook for as many positions as possible, such as lighting director, grip, best boy, etc. It would seem pretty basic for the executive director to have all those positions filled as far in advance as possible and to have however many conferences it takes separately or in advance to make sure everyone has at least some idea of how a shooting set operates and what their role will be. Right down to who yells "action" and/or "cut"!