Why we should plan every step in our lives? When I was in high school in preparing the process of exams I did weekly planner because it was require but I think in university life we can plan our days in our minds. Even we do the planner sometimes, unannounced events might be happen and prevent your planned steps. For example, one of your  friend call you to meet or guesses come to your home so, your plan couldn't work successfully. On the other hand, of course planner is the effective way for working. Also, we did the exercise for reviewing and to remember our education which were thought before.