I'd be 61% done with my book. That's just been in the last month. It came from under half done, to over half done. I have to admit, though, I'm actually rewriting already written chapters, but what the heck. It's all the same to me. The finish line is almost in sight.
You know when you think you've written a good scene? When it makes you feel good. When everything seems to be in place and when you think, come rewrite, there won't be a need to rewrite the good scenes. That's a sign that you're almost there. I'm feeling good about it and I thank you, my readers. It's all your fault, er, doing.