Take a real knife (kitchen knife, gardening knife or anything that cuts and stabs) and lie on the floor. Move the knife around and under your body lifting only as much as needed. Sit on your behind and do the same, stand on one knee and do the same, squat and do the same, stand and do the same.
Now Using the tip of the knife draw your full name in the air and do the same with your other hand. Do the same using both hands together and than using only your arm from the elbow down. End this by writing using your wrist alone and of course repeat the drill by writing with the butt of the knife. Remember that all of your faculties must attend to make you whole. Soul, body and mind.