Manage Your Energy, Not Your Time

The most useful frame here comes from Jim Loehr and Tony Schwartz, who studied elite performers — athletes, then executives — and concluded that energy, not time, is the fundamental currency of high performance. You can't make more hours. You can renew energy. And it comes in four distinct kinds, which the workshop mirrors.

Here's what people miss. You can be physically rested and still exhausted — because you've been drained in a dimension you weren't tracking. The day of “I did nothing and I'm shattered” is almost always an emotional or purposeful drain wearing a physical disguise. That's why a straightforward to-do list never fixes it. You have to audit the right dimension, then do the unglamorous work: remove one drain, protect one source.

There's a real opportunity in this stage of life. For most of your career, your energy was spent meeting demands other people set. Increasingly now, you get to choose where it goes. But that freedom is wasted if you never look at where your energy actually leaks.

So hold two things at once: you have less raw physical energy than you did at thirty, and more control over how you spend what you have than ever before. As Greg McKeown argues in Essentialism, the move is to do fewer things, better — and, as Katherine May writes in Wintering, to accept that depletion is sometimes a season to be rested through, not a failure to be pushed past.