Let’s say you go to work for about eight hours a day and spend eight hours a night sleeping. Then there’s the time it takes to travel to and from work, the time it takes to cook and eat meals and the time you set aside for all of life’s other important responsibilities, like doing chores and running errands. All told, you may spend about 20 hours each day doing things you absolutely have to do. This still leaves you with four hours every day that are yours to use as you see fit. After weight loss&nb...