I spent some time today with my friend Dr. Patrick Porter today. He has always had trouble with his golf swing being too steep. This is a very common error. What I had him do is make some practice swings like he was hitting a baseball. Yes swinging like he was hitting a baseball. This forced him to swing his golf club more level to the ground, (more shallow). Gradually I had him lower his golf swing lower and lower until he could reach the ground.
Then I had him hit some golf balls and he actually started to draw the golf ball instead of slicing it. If he just keeps on doing the baseball swing drill it will gradually shallow out his swing.
Maybe this drill will help you too if you have a shallow swing. My G-TEAM members get tons of drills just like the mentioned in this posting. Learn more about the G-TEAM membership at only $79 per year at http://www.bobbylopezgolf.com.