If you improve the quality of your thinking, you improve the quality of your life sometimes immediately. Time is your most precious resource. It is the most valuable thing you have. It is perishable, it is irreplaceable, and it cannot be saved. It can only be reallocated from activities of lower value to activities of higher value.
All work requires time.
And time is absolutely essential for the important relationships in your life. The very act of taking a moment to think about your time before you spend it will begin to improve your personal time management immediately. I used to think that time management was only a business tool, like a calculator or a cellular telephone. It was something that you used so that you could get more done in a shorter period of time and eventually be paid more money. Then I learned that time management is not a peripheral activity or skill.