When you first quit your regular job and you become a full-time writer, you are paralyzed with free time. You have so much free time. When you are at home, you have a guitar. There's a cat. You got to find ways to create an environment when writing is like going to work. Be efficient with the hours you put into the book. So I go there the same time, every day - like 7:30 am - and I leave around 2 pm, or longer, if I have a deadline.