One of the main disadvantages of using time management is that you have to spend some of your time developing a plan to follow. If these plans get sidetracked, you feel pressure to go back on the schedule you set for yourself, thereby interrupting other plans. Plus, since you have a schedule, you tend to leave the people around you slightly tense because they don't know how much time you've allocated for them. Disciplining yourself to follow time management is difficult in itself. This is mandatory to achieve the goal you have set for yourself. Some of the obstacles to effective time management are: having an unclear goal, the inability to say no, interruptions in our daily lives, stress or fatigue, and the old adage "all work and no play makes Jack a bore ».