The 6-Minute Work Day
Time Warrior: How to defeat procrastination, people-pleasing, self-doubt, over-commitment, broken promises and chaos
amazon.com

Four Seconds: All the Time You Need to Replace Counter-Productive Habits with Ones That Really Work
amazon.com
The Daily Drucker: 366 Days of Insight and Motivation for Getting the Right Things Done
amazon.com
Then carefully tabulate the 8 to 10 hours that you have available each day for economic productivity. Find out whether your efforts were driven by your plans and your agenda or whether you were responding haphazardly to random stimuli.