What's the one gesture that resets you before you have to be 'on'?

Tonight I noticed I've been trading the whole glamour act for a quieter pre-show ritual — a certain way I press my palms flat on the dressing table and just let the mirror go soft for a minute. Before the makeup hour I used to need the buzz, now I need that small stillness. What do you do when you have to switch from your private self to your public one?