The Five Wisdoms of Open Development
If it didn't happen on the dev list, it didn't happen.
Whatever you're working on, it must be backed by an issue in the tracker.
If it's not in the source code control system, it doesn't exist.
If it's important, it needs a permanent URL.
What happened while you were away? Check the activity stream and archives.
As usual, following recipes without understanding what they're about won't help - I use those wisdoms just as a reminder of how things are supposed to happen, or more precisely how people are supposed to communicate.