Acting

When you go into the professional world, at a stock theater somewhere, backstage you will meet an older actor--someone who has been around awhile. He will tell you tales and anecdotes about life in the theater. He will speak to you about your performance and the performances of others, and he will generalize to you, based on his experience and his intuitions, about the laws of the stage. Ignore this man.

Act in your pauses.

Use your weaknesses; aspire to the strength.

Know your lines and don't bump into the furniture.

Have a very good reason for everything you do.