Recently, Seifert wrote about time management and his old job as a security guard on his blog. He hits on one of the fundamental differences between writing and most other jobs.
Like a lot of jobs, working as a security guard is about putting in the hours they ask you. But comics is a job about completion. It doesn’t matter how many hours you put in, whether it’s four or forty — as long as you finish and file your work. If you blew a deadline, it doesn’t matter if you just spent 20 straight hours working on it. You blew your deadline.
The nature of writing is that it's about getting the work done. Especially while editing, time with friends and family, hobbies, even personal hygiene go out the window in order to get the task finished. I think that can intimidate a lot of people, especially people used to jobs that are about putting in the hours.
Seifert goes on to talk about his adoption of the Pomodoro Technique of time management. It's a technique I've experimented with before, and as I finish up with The Drowned Forest and start thinking about new projects, it's something I'd like to get back to doing.