Wow. That really, really helps.

"I’ll just remember the advice my former professor and Pulitzer prize winner John McPhee gave me when I first sold the book: “When it seems like writing is really, really hard, just remember: writing is really, really hard. I sit in front my my typewriter from 9 to 6 each day, and most of the time, I get nothing done.”"--Tim Ferriss, author of the 4 Hour Work Week

From interview at Lifehack.org