To become proficient in passing and shooting, the player must be able to propel the ball from the stick with the wrist "snap." Many beginning players pass and shoot with an arm motion, or "push" the ball, which causes the ball to leave the stick on a low trajectory resulting in a low pass or shot. An excellent way to develop the wrist snap is to utilize the wall. Go to a cinder block or brick wall and stand approximately 3 to 5 yards away. Any wall will work (no windows), but a smooth concrete surface at least 10 feet tall is the best.
You can and will observe daily improvement if proper technique is maintained. Increase the reps as wrists become stronger. Aim for as many reps as possible with desired form, however. This is a lefty-righty work out. Attempt to do as many reps as possible. Remember, your goal is to strengthen the wrists, to become proficient in releasing the ball with the snap of the wrists, to gain hand speed, and to develop a quick release.