Whatever character you play, remember they are always doing something. They are not just talking. They are alive; going through a drama in which they will go through some sort of dramatic human experience. Keywords: Alive and Experience. It is your job to make them become so. Anthing you do on stage or film has a direct relation to something you have experienced in one form or another in real life. Use your imagination to exaggerate or lessen that sensation. Then, disguise it in characterization and don't forget to make lots and lots of mistakes, and look like a complete asshole. You`ll do fine.