I am in the process of switching from Outlook 2011 to Apple Mail, and am loving the Favorites Bar. However, I think that it would be far more useful if I could organize my bookmarks with Separators, like I can do in Safari. That way, I can divide my Mailboxes from my Sent/Drafts/Junk/Trash from my Smart Folders. Does anybody have a trick for this? As far as I can tell, you can only add items to the Favorites Bar by drag-dropping the folders.