I think you have to be who you are. I don't think you can fabricate it. I think you have to be who you are and hope that people will accept you for who you are.
Optimists tend to interpret their troubles as transient, controllable, and specific to one situation. Pessimists, on the other hand, believe that their troubles last forever, undermine everything they do, and are uncontrollable.
"Every film is a journey, not just for the audience, but for the actor as well."