The main thing to do is to check the doors and vent for any movement or activity (Doors - Close them if you see someone in the hallway or hear the sounds of movement (Cindy with her wings and Nougat with her pillars) Vents - Close and hold until whoever is in the vent (Crystal or Emily) goes away), Ensure that Achira does not enter the office, be sure to find Cruxia every passing hour (She will either be in the foyer or one of the gift shops. You will know she is there when you see a black and red figure.), stop by Thorne's stream every now and again to ensure she doesn't get all pissy by clicking the heart icon a couple times ( you don't have to spam it a whole lot, just enough times so Thorne doesn't get mad immediately), be sure to shine the light on Elina's spectral hands if they appear on screen, be sure to answer the phone when Paranoia calls and close the ads on the computer. And the important thing of all... Conserve as much battery power as you can.
You don't have to worry about Suki too much considering her pattern will reset every time you cut her off at the door.