Ctrl + Shift + End = marks the text up to the last line
Shift + F3 = changes the case of the selected text (from UPPERCASE to lowercase)
Ctrl + Enter = inserts a page break
Shift + Enter = inserts a line break
Ctrl + Home = jumps to the first line
Ctrl + End = jumps to the last line
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
Hope you'll have an easier life using them! They have helped me a lot!