Playing the ball above your feet

When you are playing the ball above your feet on the side of a hill, the ball will invariably hook left so set up to aim to right of the target.
Also you should play the ball from the middle of your stance, flex your knees slightly and keep your weight on the balls of your feet.
Finally to compensate for the ball being closer to you than it is in a normal lie on a flat surface, grip down lower on the shaft of your club.