Windows 8: shutdown button on your start and desktop
Anatoly Mironov
If you think that “Go to corner” -> Settings -> Power -> Shut down are three steps to much if you just want to shutdown your Windows 8 machine, than do as I did: create a shortcut on you desktop and a tile on your start screen. Create a shortcut as usual: 
Write in the location field:
shutdown /s /t 0
Name it something, why not “shutdown”? 
Change the default icon: 
There it is. Now we can pin it to Start: 
Done. Now, if you want to shutdown, you have to click only once: 
Enjoy!