Amazing, how much I mentally revised without actually changing the outline. It comes out very clearly when I go to actually write the outline.
Plus, I have to keep reminding myself that none of this is new to him. (Minus a few things where I redid the world-building to make it new, but that won't work for everything.) AND -- there's the subtle balance between downplaying things that aren't going to be significant owing to a sudden twist that life will throw at him, and accurately depicting his point of view, which would downplay other things, because -- ta-da! -- he doesn't know that his life is about to take a sudden twist.
It's all very well to remind yourself that that a musical's opening number is the last song to be written, but I've got to build a sturdy enough foundation to go on.