A real strength is the pretense of work (not for all jobs, mind you; it's clear, in front of a group of students, if you're truly present or phoning it in). Leave the office door open although, when you peeked in the window, no red light glowed on the phone. No missed calls, no messages. Just the way you like it.
Take a stroll by the main offices. Engage in raised voice conversations so the big ones know you're there. Stride back and forth, papers fluttering in your hands with purpose. Send emails, sign them "All the best." Thank everyone. Wish them well. Dress up, move out, get on with it.