From this Cowboys and Indians interview:

C&I: Do you have a favorite place or time to write?

Miller: I have a studio in the house and have always recorded everything there. I’m comfortable in my big music room. After a long international flight, when your mind is not all there, I think there’s an opportunity for something to find its way into a song, when I’m just getting home and jet-lagged.

I read a lot of writers talk about getting their minds clear before sitting down — interesting to see him taking advantage of being frazzled to get something out on the page. Kind of like how people get real honest late at night?