On the course, I find it very helpful just to try and make sure I go to impact fix and really see the right arm angle of approach, and the parallel delivery line of the hands to the ball. I don't want to be thinking about too much, but this visualisation really helps me (I'm trying to get away from my old circle path -forward swing, to a straight line down the plane swing). It's amazing how much disipline it takes to go to impact fix each time though!
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When James Durham recorded 94 at the Old Course at St Andrews in 1767, he set a course record that lasted 86 years. Golf: A curious sport whose object is to put a very small ball in a very small hole with implements ill desiged for the purpose - Sir Winston Churchill