Hypnosis is a great way to overcome anxiety or pattern behavior, which both can cause performance issues however without knowing more about what you're going through I couldn't tell you much. What are the issues you're having?
I do know that just about every mp3s/CD that I've heard of are not hypnosis but repitition regression, not unlike what the US amry uses in Iraq to break morale of enemy insurgents. The concept is similar but they are different animals.