If you're having problems with your backswing, one technique which will help you improve on that area is by shallowing the shaft of your club. It's a good technique but always remember that shallowing the club is not that easy, as finding the right plane during downswing is extremely difficult. Downswing relies heavily on what you do during backswing and it's important to have an assessment for that.

Learn to improve your downswing thru shallowing your clubs by clicking here.

Source: GOLF.com; RealFeelGolfMats