Key Combo
Result
Start-up keystrokes
C
Starts up from a CD.
D
Starts up from the HD's first partition.
N
Starts up from the network server.
T
Puts the Mac into FireWire Target Disk Mode.
X
Starts up in OS X (if OS 9 is on the same disk).
[shift]
Prevents start-up items from opening.
[cmd]-[option]-[shift]-[delete]
Starts up from an external drive (or CD).
[cmd]-V
shows unix console messages during start-up.
hold mouse button down
Ejects CD or DVD.
Finder Keystrokes
[cmd]-[option]-W
Cloeses all Finder windows.
[cmd]-[up arrow]
Opens the parent folder.
[cmd]-[option]-[shift]-[up arrow]
Selects the Desktop.
[tab]
Selects next item alphabetically
[shift]-[tab]
Selects previous item alphabetically
[cmd]-[shift]-H
Opens Home folder
[cmd]-[shift]-A
Opens Applications folder
General Keystrokes
[option]-click on the Minimize button
Minimizes all finder windows
[option]-Empty Trash
nukes the trash w/out prompt
[cmd]-[option]-D
Hide/Show Dock
[cmd]-click on a dock icon
Reveals original item in the Finder
[cmd]-[option]-click on a dock icon
Switches to the program and hides all others
[cmd]-[option]-H
Hides all windows except the one you're in
On Keyboards w/out Power Key
[ctrl]-[eject]
Brings up the shutdown dialog
[cmd]-[ctrl]-[eject]
Forces restart
[cmd]-[option]-[eject]
Puts the Mac to sleep
[cmd]-[ctrl]-[open]-[eject]
Shutsdown

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