Windows 8 shortcut key... something need to know

if you do not use Windows key before, you need to learn it for Windows 8,

Windows Key + C: Charms bar
Windows Key + I: settings in Charm bar
Windows Key + X: Windows tools menu
Windows Key + F: file search from charm ar
Windows Key + Q: all local apps search from charm bar
Windows Key + W: settings search from Charm bar
Windows Key + Tab: Modern desktop taskbar

mores from:
http://blogs.msdn.com/b/hyperyash/archive/2012/08/28/Windows-8-shortcuts.aspx