From Laura Vanderkam’s What the Most Successful People Do Before Breakfast:
As with money, we have a tendency to fritter away the time in front of us as if it were infinite. For some of us, that’s because our hours are sucked into the Reply All maw of an in-box. Others, perhaps, can see that the customer who wandered into their store left with her real need unaddressed and won’t be coming back. A dentist sees that a patient didn’t absorb her halfhearted pep talk on flossing and knows that the patient will be back soon for more fillings and another tepid pep talk. We find ourselves counting minutes and wishing ourselves elsewhere. These hours pass, inexorably, with little promise of leading to much that matters. They are spent and the transaction is done, like paying a late fee on a cell phone bill or buying a sweater that you never wind up wearing.
But as with money, people who build wealth take some chunk of what is coming in and invest it in ways that generate returns. Successful people know that hours, like capital can be consciously allocated with the goal of creating riches–in the form of a changed world, a life’s work–over time. Indeed, successful people understand that work hours must be more carefully stewarded than capital because time is absolutely limited. You can earn more money, but the mightiest among us is granted no more than 168 hours per week, and it is physically impossible to work for all of them.