One of my coaches Kyril Popoff of http://www.CoachKyrilTennis.com emphsizes the value of simply getting a bucket of balls and dropping them yourself and hitting them.

I do this quite a bit and what I’ve found is that I’ve been able to refine my optimum strike points by experimenting with higher or lower or further forward or further back points of contact with the ball. When I hit the ball I get immediate feedback of how that particular strike point suits me and my swing.

Give it a try and I’m sure you will learn something about slight adjustments you could make to improve your strokes.