55 balls should be more than enough for one practice session. Doing this amount of balls 3 times a week should engrain your good habits and not get bored with thinking you have to hit hundreds and hundreds of balls to improve. This is where the quality practice comes in. It's called deeper practice. Its the way you practice that gives you better results.
10 drives, 14 iron shots, 20 wedge shots from 80 yards in. Save 6 to 8 balls at the end to play a couple of holes in your mind, a par 3 or par 4. This will make you focus on your target so you feel that bit of pressure! Make those shots matter!
