The mistake that most amateurs make in playing the lob shot is that they're too stiff with their hands and arms. This shot requires more relaxation in your hands and especially in your wrists.
Relax Your Arms for a Perfect Lob Shot
The main thing that I need to see you do on the lob shot is to set the golf club or to cock the golf club, get it up in the backswing. To do that you have to use your hands, this is not a shot that we play stiff armed or stiff wristed. We want to let the club go up and let it fall and drop. Quite similar to a bunker shot. I play this shot pretty much in the center of my stance and from a narrow stance. The shot that I'm hitting here is about a 25 yard shot over a bunker to a pretty tight pin.
Using the Lob Swing
This requires the lob swing. I'm going to set the club down lightly, never deep in the grass which could cause the ball to move. So from here, set the club about an inch behind the ball, let the club go up, fall; its real important here that you turn through and face your target. The club releases back up at the finish so there's a cock up on the backswing and a cock up on the finish. This will get you into good position and you'll hit good lob shots.