Transfer the point of concentration to some object outside of yourself - another person, a puzzle, a broken plate that you are gluing.
Don't be an actor. Be a human being who works off what exists under imaginary circumstances.
Find in yourself those human things which are universal.
Listen with your gut, not your head.
Acting is fun. Don't let that get around.
If you want to reach every person in the audience, it's not about being bigger, it's about going deeper.