The ideal reaction is the gradual development of an increased "sense of well-being." At first you will notice you do not tire so easily. You "last" longer during the day, and you do not become tired so early in the evening. Next, you find you are not so tired in the mornings. You look forward to the new day and may awaken earlier. As your sense of well-being increases, you begin to feel more emotionally and psychologically secure. Little things do not bother you as they once did. Your old habit patterns begin to change from "grumpy" ones to "happy" ones.