To improve your wrist shot in floorball, you can try the following steps:

1. Start by practicing your wrist shot without the ball, using just your stick to get a feel for the motion.
2. Once you feel comfortable with the motion, try shooting with a regular ball, focusing on snapping your wrists to generate power.
3. Practice shooting from different distances and angles to improve your accuracy and learn to shoot in game-like situations.
4. Work on your overall strength and conditioning, especially in your wrists and forearms, to generate more power in your shot.
5. Finally, seek out instruction from a coach or experienced player to help you refine your technique and identify areas for improvement.

Buy the floorball books or eBooks from online bookstores like Amazon, Wallmart, Alibris, AbeBooks, Bokus, Bookshop, BoD etc. or search through Google (Search for titles: Train Floorball at Home, Floorball Practices and Drills or Training Tomorrows Floorball Players)