Fiction becomes a weird way to countenance yourself and to tell the truth instead of being a way to escape yourself or present yourself in a way you figure you will be maximally likable.
Remember this practical piece of advice: Never come into the theatre with mud on your feet. Leave your dust and dirt outside. Check your little worries, squabbles, petty difficulties with your outside clothing - all the things that ruin your life and draw your attention away from your art - at the door.