This sounds harsh, but it's one of those lessons where the sooner you learn it in life, the better off you'll be. Success takes effort—and sustained effort at that. At a certain point, a certain amount of sustained effort is going to be an essential factor and determinant of whether you have an income that can support your continued existence and survival. That's not to say that it's the only thing that matters, but for most of us, it's an important starting point. Thus, this lesson holds value…