Make sure your automatic, daily and continuous, build actually works.
It is just like checking that your backup procedures actually works. You do not want to find out either one of those is not working when you really need them.
This weekend our Team Foundation Server was moved and everything looked all right on Monday morning. There was no problem at all to connect to the new server and the Cruise Control Tray icon was a comforting green. I did have that uncomfortable feeling that something was wrong though…
… and sure enough; the configuration for Cruise Control wasn’t changed so it looked at the old server and kept on building the same old stuff.
Broken builds sucks and it should be a cooperative effort to keep the system in a buildable state, but there has to someone responsible for the automation. Someone who verifies the build frequently.