As I mentioned in the comments here, I've basically stopped reading posts by writers, because I just couldn't deal with all the chirpy little "I've written a billion words today!"-type posts.
Obviously, this is my issue--when I'm productive, I make those kinds of posts, and they're a major reason why this blog exists. But, you know, when you're not being productive, reading about other people being super-productive can be a recipe for misery. If you read that sort of post, and your very first thought is, "FUCK YOU!!" then it's time to do something else with your time.
But oddly enough, when I read this article in the Wall Street Journal about Russell Blake, I felt totally fine. According to the article, Blake "churns out 7,000 to 10,000 words a day and often works from eight in the morning until midnight."
You know, good for him, but that is a life I would never, ever want to have. Ever.
And that, I think, is the real problem with envy and getting into the habit of comparing yourself to other writers: In addition to fostering misery, it takes your focus away from figuring out what it is you actually want in life, and what you actually want from your writing. Maybe you don't want to write full time. Maybe someone else's work habits would render you entirely unproductive. Maybe your goals are not Russell Blake's goals.
There was a point in life (maybe when I was in my late 20s?) when I realized that if I wanted my life to be like Person X's, then that meant I had to accept the whole shebang--I couldn't just cherry pick the nice things. If Person X was glamorous but vapid, then to be more like them, I would have to be more vapid--and I'd rather not. If Person X was successful professionally because they didn't mind being a tiny, fairly-useless cog in an enormous, impersonal machine, well, guess what? I either was going to have to learn to love the rat race, or accept the fact that my career was going to have a more unusual trajectory.