Ctrl + M: Enter Mark mode (allows you to select text with mouse). Once Mark mode is enabled, you can use the arrow keys to move the cursor around. Shift + Up or Down: Move cursor up or down one line ...

Have you ever been playing a game on your computer and unknowingly pressed one of your Shift keys a few times in a row, only to have your game suddenly interrupted or minimized by a pop-up window and ...

Launch any app, or bring back the right ctrl key.

It's really useful outside of games, though. I use it all the time. Press Win, and type the first letters of an app's name to run it; Win+Tab for the improved task view; Win+Number to switch to a ...