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!