Here are some simple keyboard short cuts that can save you time. Let's start with the WinKey. This is the key with the backwards Windows flag or logo on it, which you may not have, depending on your keyboard.
WinKey + D Minimizes all windows and shows the desktop
WinKey + L Locks the computer (Windows XP only)
WinKey + Tab Cycles through the programs shown on the taskbar
WinKey + F Brings up the Windows Search box
WinKey + E Opens up Windows Explorer
WinKey + R Opens the Run dialog box
WinKey + Pause Opens System Properties
Using the keyboard, you might find these useful.
SHIFT + F10 Same as right-clicking an object
CTRL + ESC Opens the Start menu
SHIFT Press and hold down the SHIFT key while you insert a CD-ROM to bypass the auto-run feature
ALT + underlined letter in menu opens the menu
ALT + F4 Closes the current program
CTRL + F4 Closes the current window in a program
ALT + F6 Switches between multiple windows in the same program
CTRL + Tab Switches between multiple tabbed windows in the same program
SHIFT + DELETE Deletes selection immediately, without it hitting the Recycle Bin
Here are some shortcuts for Microsoft Word.
Ctrl + A Selects all the contents of a page
Ctrl + C Copy selected text
Ctrl + X Cut selected text
Ctrl + P Paste the selected text
Ctrl + F Opens the find box
Ctrl + B Bolds the highlighted selection
Ctrl + I Italicize the highlighted selection
Ctrl + K Insert a link to a Web site
Ctrl + U Underline the highlighted selection
Ctrl + Y Repeat the last action performed
Ctrl + Z Undo last action (I love this one!)
Ctrl + End Moves the cursor to the end of the document
Ctrl + Home Moves the cursor to the beginning of the document