Those who do intense mental work like writers and professors typically have 2-4 good uninterrupted hours of this type of work in them each day before their capacity is used up. Then they need to go and do something else to recover for the next day of focus.
What about us, we typically work 8-12 days. Are we not working to our capacity? How much of that time is burning the clock? As leaders, are we expecting our team to play the game while squandering their full capability? What else could we accomplish if we worked at that intensity? Could we even do it with all of the distractions?