Sometimes to stay focus on your key tasks seem impossible or difficult especially when you are in your office, there will always be someone calling, email you, looking for you and need your attention to assist them in getting their things done.
You can now use the 3Ds to help you to achieve that :
If those tasks that require your attention are not your core skills, you should Delegate it to someone who is more well-equipped with the knowledge and skills to achieve them. In this way, you will free up more time to focus on your key tasks and at the same time, those tasks are in good hands and will probably be completed more effectively.
Some tasks need to be completed but not right away, hence quickly identify which one of them does not require immediate attention and push it to a later time or date. I’m sure there will always be “urgent” requests or “ASAP” cases but still, you have to prioritized them.
This may sound easy but in real life, it can be the most difficult thing to do. Saying “No” to someone or rejecting a request needs a bit of courage and a clear mind. We have to learn to say “No” to tasks or requests that are totally not related or will not contribute significantly to the progress of a development or project. Saying “No” does give you more time to commit on those things that you said “Yes” to.
Now that you are able to classify your daily tasks into these "D"s then I would say you will certainly have more time to actually DO what you initially planned to do for your key tasks.