Body language reveals a lot about what a person is really thinking. Non-verbal communication such as facial expressions, gestures and movement are therefore powerful tools for actors.
When you are trying to show sad character try to be realistic and not overly critical.When you are trying to convey any emotion, try yourself believe that you are the character. Try to build up their fears, their feelings and indulge yourself in the story. You might look slightly obsessive but some of the best actors use this technique.
Its a process of “justifying” behavior with the inner motive forces that prompt that behavior in the character and “motivating” behavior with imagined or recalled experiences relating to the actor and substituted for those relating to the character. Following this distinction, actors ask themselves “What would motivate me, the actor, to behave in the way the character does?” rather than the more Stanislavsky question “Given the particular circumstances of the play, how would I behave, what would I do, how would I feel, how would I react?”
Character acting refers to certain types of eccentric roles or stylized approaches to roles, while method acting is a more realism-based preparation style applicable to all roles. … They will literally ‘become’ the character, living the part rather than using externalization and portrayal.