I've written 10000 words or so in the last couple of weeks and still have a couple of sections to put in.
But I'm finding it impossible to STOP.
Why?
Google books!
everything that you read, these days, refers to other books. In the old days you could make a note of them for interest sake, get them out of the library perhaps the next day, and make a few notes on them before you gave them back to the library.
These days, you can go to Google Books (or download online articles) and read nearly every single reference that's ever mentioned by anyone else - immediately!
Well - there isn't that much 'immediately-time' in the world, to read every reference in the world.
But it still means that I can never get to the end of a paragraph about someone else's writing....