I have to psyche myself up in the mornings and tell myself it's an acting job. "Today at our event, I will act the part of an outgoing, gracious extrovert and keep a smile on my face, not my anxious face." Then I go home exhausted from keeping up the facade.
In my little part-time job, mentoring new teachers, it's been helpful to use this comparison (especially with any who had taken a drama class or performed in music or theater).
Using my own experience, I encourage them to think about each class as a performance of their "show for the day." If they teach 5 classes, it's a "5-gig" day.
Those who do it agree: it works. Come "hell or high water," fire drills or disaster drills-- whatever happens-- "the show must go on." Insisting on keeping the whole class on board, together, helping them all get through the day's lesson plan fosters good discipline not just for the kids, but also for the teacher.
(And viewing the job as the day's "show" would keep me moving forward, no matter what was going on in my personal life. It seems to help the new teachers focus, too.)
Those acting classes came in handier than I ever expected......