Recently I read this interesting outlook on life in a book by Jeffery Deaver.  "Most of our lives are an illusion - everything in our past is memory and everything in our future is imagination.  Those are both illusions - memories are unreliable and we just speculate about the future.  The only thing that is completely real is the one instant of the present - and that's constantly changing from imagination to a memory."

If a person were to remember this as they are bowling, it would help them realize that the only thing they have control over is this ball.  All previous balls delivered are memory and any future balls to be delivered are imagination.