Smart shortcuts for your smart MAC OS X

While you are already on board enjoying your Mac, some tips and shortcuts to make your life even more easier.

1. Irritated when trash doesn't get empty... items locked basically. Try Command+Option+Shift+Backspace
2. Computer gets stuck, want to quit processes ? With Command+Option+Escape , a window pops up. Force quit the process you want.
3. Command+Shift+Q Log out
4. Command+Option+Shift+Q Log out without confirmation
5. Command+Shift+3 Full screen shot
6. Command+Shift+4 Crosshair to allow selection of screenshot area
7. Want to lock the screen immediately? You can set a hot corner for it in the expose preferences.