" wouldn't; use a plain text editor. If you make a mistake and cut and paste, you'll be in editing HECK for a long time on that post. Saving it as a plain text is the right way to go but you'll lose any formatting."
Sorry - but that's ridiculous. You don't WANT to say formatting in a non-text editor - that's what breaks WP in the first place. A plain text editor is the way to go and let the style sheet take care of how it looks. If absolutely necessary, you can always use inline CSS or html tags to further format text.
Using something as elaborate as Word or whatever to write posts and then saving as text is silly when you can just use Notepad or one of the dozens of free plain text editors and just paste the whole lot in without any worries.