GENERAL SHORTCUTS

ALT- F4 - Quit a program / Shut down
ALT-TAB - Hold down the ALT key and hit tab to cycle through open windows.
CTL-ESCAPE - Display the Start menu
SHIFT - TAB - tab backwards through a form
CTRL - X - Cut
CTRL - C - Copy
CTRL - V - Paste
F1 - Help menu
CTRL - Z - Undo

SHIFT & Restart - To restart just windows and not your whole computer, hold down the shift key when you click the OK button on the shutdown screen. Saves lots of time. (not for XP)
CRTL-TAB - Navigate tabs on a tabbed screen