I've always been a hardcore admirer of the abstracts of Peter F. Drucker. Here is something that I recollect having read on Time Management..

"Know thyself," the old prescription for wisdom, is almost impossibly difficult for mortal men. But everyone can follow the injunction "Know thy time" if one wants to, and be well on the road toward contribution and effectiveness.

Effective executives do not start with their tasks. They start with their time. And they do not start out with planning. They start by finding out where their time actually goes. Then they attempt to manage their time and to cut back unproductive demands on their time. Finally they consolidate their "discretionary" time into the largest possible continuing units. 

Find out where your time goes by recording, managing, and consolidating your time.

Professor Mamta

An effective executive does not need to be a leader in the sense that the term is now most commonly used. Harry Truman did not have one ounce of charisma, for example, yet he was among the most effective chief executives in U.S. history.

What made them all effective is that they followed the same eight practices: 

1. They asked, "What needs to be done?" 
2. They asked, "What is right for the enterprise?" 
3. They developed action plans. 
4. They took responsibility for decisions. 
5. They took responsibility for communicating. 
6. They were focused on opportunities rather than problems. 
7. They ran productive meetings. 
8. They thought and said "we" rather than "I." 

The first two practices gave them the knowledge they needed. The next four helped them convert this knowledge into effective action. The last two ensured that the whole organization felt responsible and accountable.

Regards,

Rajul