Mac on left / PC on right
*Go to Full Screen Mode and hide all panels at the same time: Cmd-Shift-F / Ctrl-Shift-F
*Go straight to Camera Calibration panel (useful for camera profiles): Cmd-7 / Ctrl-7
*Go straight to vignettes: Cmd-6 / Ctrl-6
*Export Photos using Previous Settings: Cmd-Option-Shift-E / Ctrl-Alt-Shift-E
*Apply Auto White Balance: Cmd-Shift-U / Ctrl-Shift-U
*Go straight to Find by text in the Library Mode: Cmd-F / Ctrl-F
Also, if you have your own shortcut (and I mean a killer shortcut that you've never seen before and its not in the menus) then please feel free to post it here in the comments. Thanks and Happy shortcutting!