I've just got a 750GB external to expand my 95% full 750GB iMac onto, and I'm not sure what I should move from my main Mac. I obviously won't be moving system files there, or applications. I'll probably move all my music over and point iTunes to the right place, and my 2005-2008 folders of photos from the Pictures folder. Not sure about moving all of Documents over because they aren't really sorted by year and I'm loathe to move a whole Folder from the User folder over to the external. Is there a 'good practice' guide for this sort of thing with OSX anywhere on the web? Cheers.