A good management of your lifetime requires a perennial ignorance of the most important aspect of time, namely its continual passing.
The ignorance is supported by any timetable or plan for the future, since the future data are already present in it. Though their graphic presence is not fully real, it is stronger than the passing of time can ever be.
Therefore, to live without a plan and to be simply worried for the passing of the present moments could be a bad management of time, but not a fault in understanding it. Thus, the bad manager keeps the privilege of a better knowledge of time.