They still have these wonderful coin-op Japanese massaging recliners, which I remember fondly from my last layover. Tokens last 15 minutes and are free. And if you ask nicely, you might get more than one.
The recliners are by the prayer rooms, which include a crescent, cross, and the Tibetan Buddhist swastika. (It goes the other way from the Nazi one.)
I also grabbed a bowl of overpriced noodle soup. What else are you going to snack on at 6 am?