WHY is the most important word in an actor's vocabulary.
Listen with your gut, not your head.
You can't learn to act unless you're criticized. If you tie that criticism to your childhood insecurities you'll have a terrible time. Instead, you must take criticism objectively, pertaining it only to the work being done.
You know it's all right to be wrong, but it's not all right not to try.
The foundation of acting is the reality of doing.
Acting in a scene is like paddling a canoe from a pebbly beach on to the river, the writer builds the canoe, and the actor provides the river. The river is the actor's thoughts and emotions.