Some of the most concise and useful personal productivity advice I have seen comes not from David Bowie, but from Peter Drucker. I have often rejected time management with the observation that time seems immune to my attempts at controlling or directing it; time just goes. Personal management is work, but it works.
Effective executives, in my observation, 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.
–Peter F. Drucker
From The Effective Executive
Reminds me of the “Handle the big rocks first” metaphor in Stephen Covey’s The 7 Habits of Highly Effective People.