I'm currently working on chapter 16 of BTL and have just had to stop myself from fiddling for the sake of it. I was just going over a short paragraph when I decided to add a sentence. Then I deleted it. Then I wrote a different sentence and deleted that. After I'd written another half a sentence I deleted that too. None of them added anything to what was already there and I felt that I was changing things just for the sake of it. I have had to step away from it for a couple of minutes.
Okay, I'm going back in.