I got the book based on Ian's advice and its definitely worth it; I'm still struggling with some of the visualisation techniques but have incorporated a variation of bounce - hit (from the Inner Game of Tennis) with positive results.
Rather than me explain it check out ....
http://www.tennis.com/yourgame/tipof....aspx?id=50076
... in the Golf book Gallwey talks about applying the technique to the swing, for example you might try "top" (of the swing) and "hit" (the ball) - for me "hit" was unhelpful as, fro the reason below, was any "golf term" so I "tick - tock" which I also find helps with rhythm.
Two things though, obviously it won't help with swing flaws (such as my driver problems
) which is why I think golf is only 90% mental once some level of competence is achieved, and you must play "bounce - hit" or equivalent in its own right to distract Self 1, once it becomes a golf drill the Self 1 takes over again.