The one thing my instructor had me do that worked was this(albeit setup is correct)....instead of making a full turn just bring the club to waist height and swing through with a finish, you will get pretty good results this way.
I have been swinging this way for months, perfecting my release and finish. Once I had that down I then moved to a fuller swing.
You will be suprised to find that even though you are swinging only half way you will make contact in the sweetspot and hit it longer than you did with a full swing..
Try it next time