I used to write my books at night when I was a freelancer with no children. I used to really work in huge spurts - I could turn around a revision in two weeks, I used to be able to write 10,000 words a day. It's like, 'Wow, what happened to that?' That's just gone.
It takes a lot of experience of life to see why some relationships last and others do not. But we do not have to wait for a crisis to get an idea of the future of a particular relationship. Our behavior in little every incidents tells us a great deal.