Scrum and XP from the Trenches – 2nd edition

Remote windows – big screens at each location, showing a permanent view of the other locations, sort of like a virtual window between two departments. You can stand there and wave. You can see who is at his desk and who is talking to whom

Better to be roughly right than precisely wrong!

Good: If we could redo the same sprint again, we would do these things the same way.
Could have done better: If we could redo the same sprint again, we would do these things differently.
Improvements: Concrete ideas about how we could improve in the future.