Yep, I agree with this. I wrote my first novel during my daily commute (40 minutes each way), and part of the trick was getting into the habit of opening my laptop as soon as I sat down. I also discovered a lot about writer's block. I wrote about the whole thing here: https://medium.com/@gabrielgambetta/how-i-wrote-my-first-nov... (the companion article about the open source pipeline to get it published was discussed in HN earlier: https://news.ycombinator.com/item?id=12311200)