“Manage your energy, not your time.” This is the quote that made Tony Schwartz famous. And it’s one that I believe best represents a truly efficient lifestyle in the 21st century. Yet, living “manage your energy, not your time” is incredibly hard, at least for me. It probably took me around a year to fully grasp its meaning. Since then, I’ve turned my life upside down and changed my routine dramatically.
~ Leo Widrich, The Four Elements of Physical Energy and How To Master Them.