In an excerpt from a book titled Getting There: A Book of Mentors, the creator of Mad Men, Matthew Weiner writes:
The greatest regret I have is that, early in my career, I showed myself such cruelty for not having accomplished anything significant. I spent so much time trying to write, but was paralyzed by how behind I felt. Many years later I realized that if I had written only a couple of pages a day, I would’ve written 500 pages at the end of a year (and that’s not even working weekends). Any contribution you make on a daily basis is fantastic. I still happen to write almost everything at once, but I now cut myself slack on all of the thinking and procrastination time I use. I know that it’s all part of my creative process.