Do you have a "to do" list? Do you also have a "stop doing list"? Most of us lead busy but undisciplined lives. We have ever-expanding "to do" lists, trying to build momentum by doing, doing, doing-and doing more. And it rarely works. Those who build the good-to-great companies, however, made as much use of "stop doing" lists as "to do" lists. They displayed a remarkable discipline to unplug all sorts of extraneous junk.