Steven convey discusses four quadrans to help maximize the use of a persons time. He suggests you break down your activities into the following quadrants:

Important and urgent 

Important and not urgent 

not important and urgent 

Not important and not urgent 

You can view a sample of the quadrants at the following link http://www.lcding.com/2011/07/time-management-old-but-simple.html#.UthCgNJDvz4

I used this model and it was very effective in helping me to better manage my time. I even learned how i can sometimes mis catagorize things. e.g. when I first completed the chart I placed my favorite television shows under important and urgent because it was a new episode. The previous week kept me looking forward to the new show I was anxious and made the time for televison. However, in reality this is not important and not urgent. My advise is to not make the same mistakes as I have. Take your time and critically think about the way you manage your time.