ACTORS!!! What do you do to make yourself more believable, when playing a part?

Question:

ACTORS!!! What do you do to make yourself more believable, when playing a part?

Best Answer - Chosen by Asker: I generally write a biography of the character, with details about the relationships he has with the other characters in the play. This gives me a background. Another thing I do is to listen to the other actors, rather than just wait for my cue.