Once a week, I leave for work really early in the morning so I have a spare hour on the way. I stop by a random station on the way and spend the hour at a coffee shop reading a book. I find the change of scenery and the break from the scripted pattern really useful.
Last week, I was sitting in this little coffee shop from where I can see this junction across the Green Park station:
A horde of people talking on the phone while chewing a croissant running to catch a train because the next one is 1 min away