A major cause of off-line drives is dropping the clubhead down on top of the golf ball rather than sweeping it into the
back of the ball. To shallow your approach into impact, practice throwing a basketball
down the target line and level to the ground.
Holding the basketball in both hands, swing it up to your
top-of-the-swing position, then use an underhand motion to toss it down the line. Poor drivers will tend to throw the basketball into
the ground; good drivers will throw it down the target line. The more you can level out your toss, the better your driving accuracy.
To ingrain the motion, practice the basketball drill. If you approach your tee shots on the course seeking
the feeling of a level toss, your drives will find nothing but fairway.