I just learned some great new shortcuts for OS X!
You can adjust the volume and brightness in finer grains than you are used to by simply pressing the "shift" and "alt" keys while doing so. Another nice shortcut is the overview of special characters and emoticons that you can trigger by pressing CTRL + CMD + space. This should work in any most text input boxes.
- Finer-grained volume adjust: Shift + Alt + Volume-Button
- Finer-grained brightness adjust: Shift + Alt + Brightness-Button
- Special character and emoticon overview: CTRL + CMD + Space