As you have probably found out already, achievement and success are not only dependent on intellect, but also on effort and work ethic, planning and doing. Time management and organization skills which are part of our executive function are also essential in our efforts to achieve. Here is an interesting article that will explain this further:
http://www2.scholastic.com/browse/article.jsp?id=3746667
Some of the links within this article are also interesting, particularly the information on self-regulation and mind-theory. Should you wish to pursue or discuss this topic further, please feel free to e-mail or phone me. I would consider the time well spent.