Sort of related:
I used to put the main page for a namespace in the level above, like for an article about characters, it would be at :characters and the character pages would be in characters: (eg: character:alice_smith) but now I want the the namespace sidebar to show so I've started putting my main pages at character:start and so forth so the character:sidebar sidebar displays instead of the top level one at :sidebar. Just something to think about when you decide what to put where.
Also, get the move plugin so you can easily reorganize if you need to.