I am convinced that many whittle away time unnecessarily because they are not organised. There are three things to be said about organising time.
Many people are efficient but few are effective.
An efficient person does things right, but the effective person does the right things. Everyone develops their own system. My system runs something like this. The things I must do I put on the calendar and project them all through the year. Let us say I have someone who has been in hospital with cancer and who has now returned home.