Check-in was self-serve and hence quite fast. Security was quick, and so I had three hours to while away. Down the escalator, up the stairs. Down the escalator, up the stairs. Down the escalator, up the stairs.
If I were to design an airport, there would be large, art clocks on the walls, and dozens of comfortable businesses such as cafes with armchairs and red tablecloths, and take-one-leave-one bookshelves, and art galleries and Japanese gardens. There would be meeting rooms that looked like living rooms, and natural history exhibits. Also, gyms.
My seatmate was a garrulous matron who marveled at the weather and predicted what it might be in Amsterdam even though neither of us would be staying there.
I drew on what I've learned about meditation to make it through a sleepless night. It seemed to work, since I've experienced very little jet lag.