This is only time-saving if you have your fics saved to your memories section on LJ. 
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How to Copy and Paste from LJ Entries, New and Improved Instructions from cmshaw, YAY!<br /><br />It is, in fact, even easier than that to get to the edit function and copy'n'paste.<br /><br />1. Go to the LJ entry with the story and look at the view where you are reading comments, not leaving a new comment.<br />2. Look for the little toolbar.  There should be a button that looks like this: <img src="http://stat.livejournal.com/img/btn_edit.gif"> (if there isn't, you're probably using a style with text instead of images;  look for something that says "Edit Entry").<br />3. Click that little button (or link).<br />4. Grab everything in the entry box and paste it into your text editor.<br />5. Save as text.There's an option for editing a certain day. Enter the date your fic was posted (you can choose this even if it was posted in a community, like <lj user="ds_flashfiction"> - there's an option for "In what community" underneath), and lo and behold, there is the box with your fic and all the posted formatting. <p>

You just copy and paste that into Word, save as Plain Text, and you're all set to post.