It was not my own task, but one I had to delegate to an intern one show. We had an actor who was so old -(how old was he?)- he was so old that my guy had to go to his dressing room before his entrance, wake him up, lead him by the hand to his entry point (we were in the round), lead him to his chair in the blackout, and go get him in the next blackout to lead him back to his dressing room, where- you guessed it- he fell asleep.
but onstage, this man was a fireball!!