I just checked out the winning mind site again and found another really fascinating article on the benefits of centring and a simple explanation of how to go about it. Now I'm not saying the idea of centring is new, it isn't. I just like the simple way in which it's explained here and put into a practical sporting context. It made it feel like something I could actually do and made it clear where I would gain from it.
so check out http://www.thewinningmind.com/press/articles/miller-center_of_attention.PDF