Win 8 shortcuts

Win+E – Explorer
Win+R – Run
Win+Break – System Info
Win+D – Desktop (I use this constantly if I get trapped outside the Desktop world)
Win+Plus or Win+Minus (no shift) – Magnifier/Zoom In and Out
Win+F – Find Files
Win+Print Screen – Put a PNG in the Pictures folder
Alt-Tab – Switch between Apps
Win-Tab – Switch between Full Screen Apps
Win + Ctrl/shift + tab 循环切换应用
Win+W – Search Control Panel and Settings stuff

Win+C – Charms (right side menu) then arrows to move and enter to launch.
Win+K – Devices
Win+I – Settings in any app plus brightness, network and other useful system features
Win+Arrows – Snap desktop apps to the sides
Win+(period) – Alternate sides to "snap" Metro Apps. Add shift to reverse it.
Win-X – Admin Stuff. I'm mentioning it twice because it's THAT useful. 快捷菜单
Win+PageUp or Win+PageDn – Move full screen apps to other monitors. Super useful for News apps and Readers. The Start Screen can be moved as well.
Windows+1 launch the first thing in your taskbar
Win + H 打开共享栏
Win + Q 打开应用搜索面板
Win + Z 打开应用栏
Win + / 回复默认输入法
Win + O 禁用屏幕翻转
Win + , 临时查看桌面
Win + V 切换系统通知信息
Win + Shift + V 反向切换系统通知信息