Most of the recent U.S. Presidents have been regular exercisers, as well as most of their Vice Presidents. Are you busier than the President? You don't have to exercise for 30 minutes straight. You will get the same benefit from your weekday workouts by doing them in pockets of time: 5 minutes here, 10 minutes there. Many who start an exercise program find that they don't need as much sleep as they get in better shape, and exercising for 30 minutes or so gets the day started. It all gets down to the question "Are you going to take control over the organization of your day or not?" Spend a few minutes in the morning to arrange your schedule. By making time for exercise, you'll also tend to be more productive and efficient and will "pay back" the time. The bottom line is that you have the time – seize it and you will have more quality in your life. Your loved ones will appreciate this too because, after a workout, you're nicer to them.
-From my new book Mental Training, How to Stay Motivated, Meyer & Meyer Sport, Ltd., 2011