I don’t take Concerta every day, and more often than not I don’t take it at all. For example, I don’t take it when I’m on a six-country speaking tour. I don’t need it when I’m skydiving or when I’m training for an athletic event, because my body makes the chemicals just fine on its own at those points. I do take it, however, when I need to focus on tasks that don’t hold my attention, such as paperwork, listening at meetings, completing expense reports, and sometimes focusing on people with whom I need to do business.