Again, please bare with my newbie-golf ignorance:
Watching the pros play, it seems like every iron shot they hit, they tear a sizeable divot. When I play, it seems like my best shots come with no torn grass, but it also feels like I'm "clipping" the ball.
When I do tear divots, it's always right before the ball, and I never get clean contact....so logic is telling me that PGA guys tear the grass after the ball.

If I'm right, how do you get in that habit, and when is it ok not to tear one?
Mike