All I can suggest is to make sure you have thorough knowledge of lighting, sound, set building, and discipline. A
stage manager can be ultimately responsible for every aspect of a production, good or bad. You have to know what is going on in both worlds: Technicians and cast. Cmmunicate with both. As a
stage manager, I prefer letting the lighting and sound technicians do their own jobs, and I just focus on the
stage. I make sure that everyone and everything is set, and that the backstage aspect of the production runs smoothly. I generally do not communicate with the booth much if I don't need to. The show I am working on right now (The Unsinkable Molly Brown) has several major scene changes, so the set and
running crew require most of my attention.
Hope This Helps!