There's nothing like a good long walk to clear the mind, and this weekend saw a 26 K hike up to the third highest mountain in South Korea. It was mostly uphill, sans switchbacks, so I had a lot of long slow thinking time. The result? I think I have a basic construction of the next chapter. I also think there will only be two more chapters after that.
The moral of the story is that hiking is pretty much good for your body and your mind (though my legs disagree with at least half that statement.)