If you have even the most rudimentary time management system, you probably have a to-do list. But you probably don’t have a not-to-do list, and that can be nearly as important in keeping you on track and ensuring that you’re spending your time in the places where it will pay off the most. Often when you’re struggling to manage your time well, you may find that potential projects, tasks and meetings keep popping up that aren’t high priorities for you, but which you say yes to anyway because you feel obligated, or you want to be nice, or it sounds like it could be a good idea. Read more.