The D category is not urgent. These activities are those things that can be put off for a couple of days. If we take an honest inventory, we d find that many of them are activities that we needn t be doing at all. The biggest temptation that unfailingly traps is chatting on the phone. Do not spend more than five per cent of your time on 'D' tasks.
Time is money, as they say.
However, time spent cannot be earned back like money. A good way of optimising time is by writing on a paper the tasks to be addressed for the day. I know I have to get cracking on interviews or research and do any filling the blanks for these specific topics immediately and concentrate on tying them up. It gives me a focus. Once the list for the day is complete, mark it as 'A', 'B', 'C' or 'D' and address them accordingly.