Move your chair up to a table, placing your hands upon it, clenching the fists, keeping the back of the hand on the table, the thumb doubled over the fingers. Now fix your gaze upon the fist for a while, then gradually extend the thumb, keeping your whole attention fixed upon the act, just as if it was a matter of great importance. Then gradually extend your first finger, then your second and so on until you open the rest. Then reverse the process, closing first the last one opened and then the rest, and finally you will have the fist again in the original position with the thumb closed over the finger. Do this exercise with the left hand. Keep up this exercise first with one hand and then the other until you have done it five times with each hand. In a few days you can increase it to ten times.