At a certain point you feel so busy and exhausted that you can’t take advantage of the free time you actually have. At least, that’s been my experience. When I spend all day doing things I have to do (emphasis on “doing”), an hour without responsibilities can easily become an hour in which I can watch tv without feeling a twinge of “I should be doing X.” I feel like I’m only busy to a regular degree, however; my experience interviewing prospective students showed me that the more one has to do, the better one gets at getting things done (i.e. the high school varsity football player/straight-A student/orchestra member is much better at organizing his/her time than I will ever be). So perhaps in order to feel less busy we should all take on more responsibility… you try it first and tell me how it goes.