I vote for keyboard shortcuts. Don't forget to add the help screen. Use "?" ( shift+ "/" ) to get there. Thoughtful, workflow focused keyboard shortcuts would be a big service enhancement for me. Excellence in this area include Gmail and Box.com.
@Evernote, can I help you with Mac usability? I would add a number of new keybaord shortcuts and I would improve tab and arrow use. Goal = Keep hands on keyboard and away from mouse!