When I travel for work, being in meetings all day and in an unusual place can be draining. Many years ago, I developed the habit of when I get back to my hotel room:

* Turn off all the lights

* Lay flat on my back in bed

* Put on headphones

* Listen to a few songs and give them my full attention

It very much helps me unwind after a long day. But it's also astonishing how much more I hear in the music itself when I do this. I remember the first time I listened to Portishead's "Wandering Stars" this way, I could immediately hear the slight push and pull where the organ riff isn't exactly on beat. I'd never noticed that (consciously) before.