Windows Key Shortcuts (in Windows 7)

Win+Up Maximise

Win+Down Restore/Minimise

Win+Left Snap to Left

Win+Right Snap to Right

Win+Shift+Left Jump to Left Monitor

Win+Shift+Right Jump to Right Monitor

Win+Home Minimise/Restore all other Windows

Win+T Focus the first taskbar entry/Pressing again will cycle through them, you can can arrow around.Win+Shift+T cycles backwards.

Win+Space Peek at the desktop

Win+G Bring gadgets to the top of the Z-order

Win+P External display options (mirror, extend desktop, etc)

Win+X Mobility Center (same as Vista, but still handy!)

Win+a number key Launches a new instance of the application in the current number slot on the taskbar.

Example: Win+1 launches first pinned app, Win+2 launches second, etc.

Win + +
Win + -
(plus or minus key) Zoom in or out.