A fun game to play when you have a completely unmanageable inbox is to start replying to long email threads that you were included on but never participated in. It helps if the administrators of your mail system allow messages to stick around for about 3 months–usually long enough to potentially impact a decision, but way too late to do so without tremendous cost.
The key is to remain inconspicuous about your trolling. You must raise legitimate concerns, but not be too adamant about decisions being changed. The best policy is to plant little nagging doubts in everyone’s minds, then walk away.
Start with the oldest threads first, resurrecting them in mid-discussion, then sit back and watch the discussion re-ignite.
Repeat in sequence with newer threads in your inbox once the entertainment value of the current thread dies away.