I saw these useful shortcuts posted by Bogdan:
Ctrl + Shift + End = marks the text up to the last line
Shift + F3 = changes the case of the selected text (from UPPERCASE to lowercase) AND TITLE!!
Shift + F5 = jumps to the last edited text (even after Word is restarted); pressed again, it will move between the last five edited bits of text
and want to add some more:
Ctrl + F6 = toggles open windows in Word 97
Ctrl + < = reduces font one point (you can hold it pressed to keep on reducing)
Ctrl + Shift + < = increases font one point (you can hold it pressed to keep on increasing)
Alt Gr + 4 = ~, useful for phonetics or Portuguese: /bõ:/, pão, Camões. Use as any other accent.
I hope they're useful to you.