Some stuff which might be nice.
Display icons in the mail folder list of Outlook 2013
The new design is pretty nice but it is pretty annoying and hard to work with when you have a lot of folders. Use CTRL-6 to switch to folder list with icons in Outlook 2013. The folder list delivers pretty much the same then the mail list (CTRL-1) but has icons.
Hotkeys for Outlook 2013