Bagger i've experimented with this in my game and i have to say i've had the opposite effect that you experienced. I love the precision involved in aiming at a specific blade of grass or dimple on the ball. But it seems that every time i intensely focus on an aiming point like that i forget to make a golf like motion. It's like the more i focus on a specific point the more my mind forgets about what my hands are doing.
I seem to play my best golf not particularly conscious of the ball at all, just thinking completely about my hands.