I'm not stuck. No, really.
I'm not really sure that there is a thing you can call stuck for me (can't speak for other people), not properly. I know what things have to happen in this chapter, and the last one is in fact already written, so I know where I need to get to and I know what's going on along the way. I just don't have a key to get into it yet.
It's like a big bundle of wool where you know perfectly well there must be two ends and you can see there's quite a bit in between them, but blowed if you can find them. What I need to do is go for some walks. Part of it slipped into place about 3.30 this morning (accompanied by the World Service), but that's not such a good method. Walking is the thing. In snow if necessary (and looking outside, it might well be).