On the 1st tech day, my ASMs and I look over backstage for safety hazards, potential traffic issues and coordinate last minute "homes" for offstage scenery, furniture and quick-change areas. The ASMs take little time to mark sight lines and put glow tape where its needed. We work backstage to FOH. The next thing we address are run lights and work lights issues and questions we have with the Elex crew when they're available or we go grab clip lights. Once the backstage areas are ready to GO for the day, I spend couple minutes on my SM station at FOH, getting familiar with the controls/setup. The ASMs meet briefly with the deck crew to go over their runsheets, and answer questions they have before we start. Of course that happens when they're not currently needed by their dept. heads.
Before the day even starts, the ASMs and I already have put together a "game plan" a to-do list of things that we need to get done before we actually start. Job assignments from that list are distributed and off we go, and report back to each other at times we already agree upon.
Usually, the cast waits in the greenroom once they arrive. So the ASMs and I drop by when we can to go over any last minute notes/info we have for actors.