Then I decided this may be a shade ironic given this was about making megadungeons manageable.
So I thought... mindmap? Plus I had to give XMind 2013 a spin.
This reminded me just how much good stuff is out in the blogosphere. So for your viewing pleasure...
Mindmap: Manageable Megadungeon (PDF).
Or if you prefer, XMind 2013.
There are numerous lists out there (some included) but keeping track of it all is a challenge. For those less able to speed-read, this may be some help. Please provide feedback in the usual location!