Send them a stage manager telegram (available here at stagemanagers.org on October 10 only).
Buy them their favorite snack.
Leave them a card of appreciation.
Leave a treat on their table or at their stage manager console.
Gift certificate to their favorite restaurant.
Gift them a membership to the Stage Managers’ Association.
Change your Facebook Profile picture to your favorite Stage Manager on October 10 only.
Have your company thank them from the stage on International Stage Manager Day – October 10.