I have very rarely ever given a first time lesson and not had to break someone of the following bad habits: Keeping the head down or still and arms straight. Both of these ideas are horrible and very unathletic. Anyone that tries to intentionally keep their head down reverse pivots and most people that keep their arms straight do not get the ball air born. These concepts are never taught in other sports and they have no place in golf. Golfers need to focus on good posture and an athletic setup. Both of these concepts will produce results that a golfer desires. If it creates tension or limits motion in the golf swing it is most likely bad advice.