Quick Tip - You can listen to all the Notifications being sent around by passing in nil as the name to addObserverForName:* methods on a NSNotificationCenter instance.
This is particularly useful for snooping on other frameworks and around the many system notifications that get sent. Obviously, remove once you've found anything you're looking for :)
This has been a "Quick Tip" style post. Short, simple and to the point. What are your thoughts on this style? Tell me on Twitter!