Originally Posted by cluckcluck
Going to give my two cents:
Try to make contact with the ball at 45 degrees from your core. This way you're hitting the ball at the apex of your stroke and will have the racquet face going through the plane instead of being late and face being open (high trajectory).
This is another good piece of advice. I use an eastern grip as well, and I find that If I'm too late to the ball (i.e., the ball is more or less directly to the right of my body) at the point of contact, then it's going to sky-rocket and there's little I can do.
To counteract this effect, I try to hit the ball early. As soon as the ball crosses the net, I've already pulled my racquet up in the "ready" position. When the ball is about 10 feet away from me, I've already started to swing my racquet. If timed right, the contact point of my swing is between 1:00 and 2:00 on a clock.
A lot of amateur players habitually swing too late. They don't start swinging the racquet until the ball is practically right on them. This causes a lot of unforced errors, mis-hits, and a general lack of control.
Hope this helps.