When I was young and an eager, ambitious whippersnapper, I could keep running all day long. I easily flitted from project to project and my main challenge was time management and scheduling so that I made sure to get everything done according to the list of priorities that I maintained. As I keep circling around the sun, I realize that over the years, it has become less about time management and more about energy management. There are things that I could add to the list of items to work on, but I simply don’t prioritize them. One aspect is that I simply have less energy than when I was young, but I believe that the bigger part is that I simply have started to realize that most things I could spend time on are not worth it. I have shifted from a focus on quantity to a focus on quality: I only want to spend time on things that I believe are worth spending time on. I have rigorously cleaned my to-do list to remove things that others want me to do but that I don’t feel are worth my time. That is perhaps the biggest benefit of no longer working in industry: I have much more agency in how I spend my time. So, as a reminder to myself and your, dear reader: are you spending your time on the things that you feel are worth spending time on? And if not, what are you going to do about it?