Useful key bindings in Word

Key combination
What it does
Ctrl+Space strip off manual character formatting of highlighted text
Ctrl+q strip off manual paragraph formatting of current paragraph
Ctrl+Shift+n apply the normal style to highlighted text/current paragraph
Ctrl+Shift+8 toggle show/hide hidden characters (like the ¶ button)
Ctrl+Shift+e toggle track changes on/off
Ctrl+h open find/replace dialog (F5 for find only)
Ctrl+y redo
Shift+F5 visit the last 3 insertion points, cyclicly; if used immediately after opening a document, takes you to where you were working when you closed it
Shift+F3 cycle through cases (eg ALL UPPER) for the highlighted text
F8 select word/word/sentence/para/whole document with consecutive presses
Ctrl+F3 cut selected text to the spikea
Ctrl+Shift+F3 paste from the spike
Ctrl+hyphen optional hyphen (for line breaking)
Ctrl+Shift+Hyphen nonbreaking hyphen (for things like X-ray)
Ctrl+Shift+Space nonbreaking space (for things like J Smith) (HTML insiders, think  )
Ctrl + Keypad minus en rule (called an en dash by the vulgar)
Ctrl+Alt+Hyphen / Keypad minus might insert an em rule (does not seem reliable)
Ctrl+Shift+c copy formatting (like Format Painter) but does not forget after a single pasting
Ctrl+Shift+v paste formatting (like Format Painter) but does not forget after a single pasting
Alt+F9 toggle visibility of field codes
F4 repeat last action (Vim users, think of '.')
a When you cut to the spike, the text is removed from the page. Let's say you have 4 paragraphs A, B, C and D (could be other objects, images, tables). You highlight A and Ctrl+F3, then go elsewhere in the document and highlight B (Ctrl+F3) then C and D. The contents of the spike is now all 4 paragraphs. You go to your insertion point and hit Ctrl+Shift+F3, and each paragraph is pasted on its own line, in the order A, B, C, D. You can use the spike to make extracts, reorder paragraphs, and so on. It's not like the copy buffer.