Bad news is okay (socially) if it is known in advance.
Techniques for making designs mure testable, especially in the presence of multi-threading.
How an A-grade PM (Program Manager) can manage politics for you.
How to work around certain mediocre coworkers. (This is not common.)
How to aggressively filter my email inbox.
The zero-inbox style of email management.
WiX (for development of MSIs)
(Also did this at Google with Mondrian.)
Failing to unregister listeners can cause memory leaks, particularly if an object registers a listener on another longer-lived (or immortal) object.