A keyboard shortcut for 'link requests' would be really useful - this is a feature I use a lot :)
Another thing I'd really like to see a shortcut for is for 'add new work log' .
It would also be really handy if there was some sort of 'quick close' -- either a button or a shortcut -- as often people reply saying 'thanks' and a quick way to close those tickets could make things a bit faster.