golf is a game of opposites. Greg is right teeing the ball too high could cause a skyed shot but on the other hand teeing the ball too low could do it as well. If you tee the ball too low then you will have too much of a decending blow and hit the ball high on the clubface. It can also work the other way around if you tee the ball too high you could hit low shots becasue you consiously know that it is teed too high and you hit the bottom of the club.