I use Emacs for all my writing. As far as producing documents, if it's math-oriented, I'll tend to use LaTeX and render to PDF. If it's for my blog, I write t

I use Emacs for all my writing. As far as producing documents, if it's math-oriented, I'll tend to use LaTeX and render to PDF. If it's for my blog, I write that in Markdown, though I'm considering switching to Restructured Text or some other format -- it's hard to get what I want done in Markdown without adding a crap-ton of extensions, i.e. distractions. Emacs certainly can be the ultimate time waster in and of itself, and I won't deny that I've spent a lot of time configuring my init files. But, the basic experience is pretty much a blank screen, until you hit the control or meta keys, so I consider it pretty well suited to distraction-free writing. And, when you get to editing, it has some world-class text manipulation capabilities that make it hard to beat.