I just found out about two great Xcode keyboard shortcuts that blew me away (I get easily excited);

⌥⌘J

⌥⌘L

Filter in Navigator

Filter in Library

The sweet thing about these is that they pop open the left or right sidebars (similar to ⌘0 and ⌥⌘0) but without the animation. Thanks Daren.

Apple's full list of shortcuts can be found here.