Handy collection of Windows 7 keyboard shortcuts

Win+Up: Maximize the active window
Win+Down: Minimize / Restore the active window
Win+Left arrow: Snap the active window to left
Win+Right arrow: Snap the active window to right
Win+Shift+Left: Jump to left monitor
Win+Shift+Right: Jump to right monitor
Win+Space: All windows become transparent, you can peek at the desktop
Win+Home: Minimize all but the active window
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+T: Focus and scroll through items on the taskbar
Win+1 to 5: Choose item by its location order on the taskbar
Win+(+/-): Zoom in/out
Shift+Click a taskbar item: Open a new instance of that application