Have you ever had that great idea for something but no time to execute it? So you just let it sit there in your head; distracting you from the work at hand. We call that wasting time. New ideas pop into our head all the time and if we acting on them all, we would truly never get anything done. This is where "back burner" items come into play. Use the last page of notes in your planner as your "back burner" log. Write down those great ideas that you don't have time, or it's not a priority to execute. You may find that the "great" idea that you put on the back burner list wasn't such a great idea after all. You may go back to it when you have time and have even more improvements to the already great idea. The whole point of writing it down, even when you can't work on it, is to get it out of your head so you can focus on the task at hand. Don't let your thoughts distract you; get them out of your head.