From deepwork https://g.co/kgs/muQ3Bi I realized adventure making would be more than a 15min activity. I had previous goals of keeping it at 15 but after deepwork if the adventure creation doesn't go deep its value as personal improvement, a way to be in the zone or have flow, etc is vastly diminished. I would have just eliminated the opportunity of personal growth.
Deep work has also given me an idea of using the first 15 mins letting the players immersed and set the rhythm of the turns and how to push for flow. It also points out diminishing returns for the hard mental activity as well as how changing gears helps the pacing and the brain from burnout.
If you use GTD for gaming and life , thinking fast and slow for mental stretching and problem solving challenges, Grit for character development guide, then deepwork would be a good book that applies to life and games. Game prep and the session fall under deep work (one is collaborative deep work).
If you happen to take general productivity tips, techniques, and inspiration and apply it to life and games I'm always up for finding more.