Focus on your form: Good form is essential for a powerful and accurate shot. Pay attention to your grip, stance, and follow-through. Use your whole body to generate power.
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)