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.

Do as much as much of this routine 4-5 times a week for 15-20 minutes (no more). Beginning players should start at 30 reps with each hand before moving to a different part of the drill. Your goal should be to get through the entire drill (50 reps with each hand) with each hand in under 20 minutes. If you only get through part of the drill, it is easy to set a goal for next time.

Proper 1 hand technique:

Wearing gloves, hold the stick in one hand at its balance point and then place the head of the stick in the "box" area next to the ear. Then with one hand, "snap" the wrist which will cause the ball to come out of the stick in a straight line and bounce off the wall straight back into the stick kept in the box area. This will be difficult at first. Do not take shortcuts. Keep the head of the stick in the box and not down off the shoulder.

Proper 2 hand technique:

Wearing gloves, hold the stick with your top hand approximately half way down the shaft of the stick. Your opposite hand should cover the end cap. Snap the top wrist while bringing the bottom hand towards your dominant arm pit. This will help to keep your stick in a vertical postion. Try to keep the head of the stick in the box at all times. Passing is like casting a fishing line. Be ready for the ball to return in a hurry. Change your foot stance as you change your hands, that is lead with your left foot if passing from the right, and so forth. Stick protection is important.

Proper Cross hand technique:

This is the similar to two hand technique. Hold the stick such that the dominant hand is across your body. The head of the stick should be kept in the "box" near the opposite ear. This will be awkward at first but only the advanced players will get to this stage.

DRILLS: (Beginners 30 reps with each hand)

1 hand: catch and 1cradle
2 hands: catch and 1 cradle
2 hands: quick stick
2 hands: split drill -catch righty, switch and throw lefty/ catch lefty switch and throw righty
2 hands: catch, face dodge, and throw
2 hands: catch, fake, and throw

You must be at 50 reps with each hand before passing this point.

2 hands: cross handed
2 hands: behind the back
2 hands: running along the wall throwing and catching.
Be creative: if you get to this stage, you have earned the right to!
Remember the above must be performed in the correct manner, that is: stick in the box, overhand motion, wrist snap. If your form is sloppy, such as letting the stick hang down off the shoulder, you will be slinging the ball and thus wasting your time.
CORRECT FORM MUST BE ADHERED TO, OR YOUR EFFORTS WILL BE WASTED.