Did the same for my final thesis. It is a daunting thing to start (which led to way to much procrastination). I eventually started by trying to break it into managable bits (pre audition, audition, rehearsal, hell week, run) and listing what I wanted to deal with in each. Any forms that you use, I would include. Examples of everything you discuss (audition notice, prompt book, call sheets, line notes, etc). Job duties of not just the SM, but ASMs, major production personnel, various crew positions, etc.
Bit by bit I ended up with something like 65 pages, which seemed just about right-not too much doctrine that would stop someone from developing their own style, but enough to point them at thing they needed to handle.
I also took the emergency procedures (medical, fire, weather, power outage) and included them on bright green paper with large text. It even included the announcement for various issues to simplify the process.
Not in the industry professionally, so take my advice with a grain of salt, but feel free to PM me for specifics on what I threw in mine.