[Daz]

Once I have decided on the distance, type of shot and target, I think in pictures and let my body react. No swing thoughts, just visual images.

Spot on EdZ. Thinking about mechanics is detrimental to performance. Remember Homer's distinction between practise and playing the game. When playing we should be focused on the shot in hand and forming the most lucid image of the shot we can.

"Strong images are like seeds in our soul, when they are planted there they grow, start havin' a powerful effect."
"Advertisers and propagandists know this"
Shivas Irons - Golf in the Kingdom

Anyone hitting the ball well on the range but not producing the goods on the course should take a break from the yellow book and read the green book (The Inner Game Of Golf - W Timothy Gallwey). Try and trust the techniques in here and you will be amazed at the things your body knows how to do if you just let it.!