Trying to stay within a particular word or character count? Using Ctrl+Shift+G replaces two Ribbon clicks. Turn it off with Esc.
Convert whatever formatting has been applied back to Normal style. Just tap Ctrl+Shift+N.
Feel like a T-rex trying to type on a plane while sitting in the middle seat in coach? Hit Shift+F10 to sub for a right-click. Use Shift+arrow keys to select what you want to right-click.