I use either MS Word (if I write at work) or OpenOffice.Org (at home). I export to text, open it up in Notepad to clean up things like funky-ass quotes and crap like that.Then I use the Fan Fiction Format Tool to change it to the correct settings for submission, let that stew, and throw it to Gryph to edit.
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Geoff Depew - Darth Mephron
Haberdasher to Androids, Dark Lord of Sith Tech Support.
"Brazil has decided you're cute."