Shinning Stars of Mac Keyboard Shortcuts

As an victim from mouse RSI, I tends to avoid mouse as much as possible and use keyboard shortcuts whenever I can. A month into using Mac, here are the shortcuts I find most frequently hit.

1. Command+Q, it by far the most useful shortcut since quitting an application would otherwise imply going to menu XXX and click on Quit XXX.
2. Command+W, it comes in second since the little red cute buttons in the top left corner of every windows are just not so easy to aim.
   
3. Command+Space, by default it's set to Spotlight, but with a launcher (which everybody should have btw, e.g. I use Quicksilver) directing Command+Space to launcher is a wiser idea. With a launcher, Spotlight will be too dim to see.
   
4. Command+O, Command+Down, opening a folder or a file. Not being able to open a file by hitting the Enter key bothered me for a while. Those shortcut keys are the cue.
5. Command+Up, goes to parent directory like what Backspace does in Windows. It's logical enough, I can't complain too much.
6. Command+[ or ], going back and forth in history.
7. Control+Eject, shut down/restart/suspend mac. At least once a day, not to be ignored.