As you go about your business, be respectful and responsible in your dealings at work and with all contacts you make along the way. Be positive and pleasant. Make sure you are someone that people really want to work with. Don't be the difficult actor. A director who is casting a role is more likely to choose an actor with whom he has previously worked - provided that the experience was a positive one. A director may pass over an actor who is more right for the part, but has a reputation or "history" of being difficult, or habitually late, or a substance abuser, or generally irresponsible or caustic. You get the picture. People who are difficult take energy away from the production. Everything must stop while precious time and energy is wasted on these "problem people" that would have been better spent on something else. Some might think that having small roles or being in the chorus might mean their behavior will not be noticed by the powers-that-be, but difficult people are noticed at all levels of the business, and once perceived as difficult, these actors have a hard time getting better roles and moving ahead in their careers.