Snow Leopard Keyboard shortcuts

You may already know a few; command-Q, command-S, but these keyboard shortcuts help you to do things faster and things you might not be able to do with a mouse. Some of the more important ones will be bolded for faster reference-

Add Selected Item to Sidebar	Command+T
Close All Windows	Option+Command+W
Close Window	Command+W
Copy	Command+C
Cut	Command+X
Dashboard	F12 (fn+F12 on laptops)
Duplicate	Command+D
Eject Disk	Command+E
Empty Trash	Shift+Command+Delete
Expose: All Windows	F9 (fn+F9 on laptops)
Exposé: Application Windows	F10 (fn+F10 on laptops)
Exposé: Desktop	F11 (fn+F11 on laptops)
Find	Command+F
Get Info	Command+I
Go to Applications Folder	Shift+Command+A
Go to Desktop	Shift+Command+D
Go to Home Folder	Shift+Command+H
Help	Shift+Command+?
Hide Current Application	Command+H
Log Out Current User	Shift+Command+Q
Make Alias	Command+L
Minimize Window	Command+M
Move to Trash	Command+Delete
Empty Trash	Shift+Command+Delete
New Finder Window	Command+N
New Folder	Shift+Command+N
New Smart Folder	Option+Command+N
Next Window	Command+`
Open	Command+O
Open Inspector	Option+Command+I
Paste	Command+V
Quick Look (at selected item)	Command+Y
Select All	Command+A
Show Original (of selected alias)	Command+R
Show View Options	Command+J
Show/Hide Dock	Option+Command+D
Turn VoiceOver On/Off	Command+F5 (fn+F5 on laptops)
Turn Zoom On/Off	Option+Command+8
Undo	Command+Z
View Window as Icons	Command+1
View Window as List	Command+2
View Window as Columns	Command+3
View Window as Cover Flow Quit current Application Save file Force Quit Navigate Spaces	Command+4 Command+Q Command+S Command+Option+esc Command+(Arrow Key)

Hopefully you have learnt something with this post and if you have any additions, don't hesitate to comment!