What are your favorite keyboard shortcuts on Mac OS X?
All of the shortcuts are my favorite!
Specifically (based on frequency of use) ⌘+H: Hide application
fn+F3: show all windows (in the current Space)
fn+⌘+F3: show the desktop
fn+ctrl+F3: show the "current application" windows
fn+⌥+F3: show the Exposé preference pane