Screenshots

To Capture the Screen:

Command-Shift-4 ----- window (use spacebar or mouse to select)

Command-Shift-3 ----- desktop

Add Control to the two shortcuts above to place the screen shot on the clipboard instead of saving it to the desktop.

Sources: http://graphicssoft.about.com/od/screencapturemac/ht/macscreenshot.htm

http://macsimplelife.blogspot.com/2007/11/mac-os-x-hibernate-issue.html