In my opinion this is the best lecture about Time Management. It is given by Randy Pausch at the Carnegie Mellon University and it is called « Achieving your childhood dreams.
This lecture is also known as The Last Lecture of Randy Pausch. It gives an excellent insight into his quest for making the best use of time and I must it is powerful.[youtube=http://www.youtube.com/watch?v=ji5_MqicxSo]