That’s because I have no intention of “growing up.” I may be a responsible adult, but if you think that stops me from performing ten-minute monologues in my bathroom mirror, you’d be wrong. If you think I have any intention of ever putting my wit away in the name of professionalism, you’d be wrong again. And if you really thought I wasn’t planning on building forts in the basement and watching Star Wars with my future kids, you’d be so, so very wrong.
It takes more energy to shift your attention from task to task. It takes less energy to focus. That means that people who organize their time in a way that allows them to focus are not only going to get more done, but they’ll be less tired and less neurochemically depleted after doing it. (The Organized Mind, by Daniel J Levitin)