Call me sad but I spent good working time sorting all my books into colour order. That’s the beauty of working for yourself, you can pretty much waste as much time as you please. Rather than worry about time being money or any other nonsense, I view this as a design exercise. The time I spent dicking about with my books helped clear my head and I’m sure my afternoon was more productive as a result.
Do something odd every day, otherwise we’ll all end up like those grey suited drones I see walking to work every day. There but for the grace of (god) go I