Practice the exercises on page 4 of the bell side of your Essential Elements book (remember, the first half of the book is for snare drum, the second is for bells and "keyboard percussion"). Remember to hold your mallets properly (you can remember how to do this by placing them on the floor and then picking them up again. This should cause your wrist to be "turned over" or parallel with the ground. Play your bells by moving your wrist up and down in a natural motion).