" Nick Saban and his University of Alabama football teams have won five national championships. Attending an Alabama practice, I was intrigued by the repetitiveness of the team’s drills. “Everybody thinks you practice something until you get it right,” said Saban in a press conference. “You really practice until you can’t get it wrong. There’s a difference.” He pushes his players to practice until they won’t make errors in execution, even when facing a variety of teams and circumstances. This logic applies to prepping for presentations. Rather than just running through a presentation in your head, practice until you can’t get it wrong, even when facing changing conditions, tough questions and multiple objections. No presentation will ever be 100 percent perfect. But repetitive, deliberate practice will polish delivery and keep you from heading in wrong directions, regardless of circumstances. "

― Sam Harrison , Creative Zing!: Spark Your Creativity — and Powerfully Present Your Ideas!