Keep it to yourself

 Tiny etiquette suggestion – stop nodding your head when another actor in your class or rehearsal is getting notes.  It comes off like you saw that and you are in agreement with the director.  It’s also obnoxious to your fellow actor who doesn’t need you to see you nodding in agreement over his or her notes.  Maybe you do understand the note, and it’s an innocent acknowledgement of that.  Keep it to yourself.  (Ironically, the last three actors who did this consistently in rehearsals and classes with me were the ones who thought themselves to be superior to some of the other actors when actually they were doing weaker work.)