I only take them if I am really tired (and I didn't get much sleep the night before) or if I am in school. Other than that, I don't take them. I guess I take them on long car rides when I am not driving too.EDIT: I can't go to sleep, wake up, take a shower, and then go back to sleep. It is impossible for me. After I am up for 5-10 minutes, I am up for good.