If you have any Windows 7 Keyboard Shortcuts that are not listed, then please leave a comment.
See: Master List of Windows 7 Keyboard Shortcuts Managing Windows
[Win+M] - Minimize all open windows
[Win+Shift+M] - Undo all window minimization
[Win+D] :- Toggle showing the desktop
[Windows+Up] - Maximize window
[Windows+Down] - Minimize windows / Restore
[Windows+Left] - Dock window to the left side
[Windows+Right] - Dock window to the right side
[Windows+Shift Up] - Maximize vertical size of window
[Windows+Shift Down] - Restore vertical size
[Windows+Shift Left] - Move window to left monitor
[Windows+Shift Right] - Move window to right monitor
[Win+Spacebar] - Aero desktop peek
[Win+Home] - minimize/maximize all inactive windows
[Alt+F4] - Close the active window
[Alt+Tab] - Switch to previous active window
[Alt+Esc] - Cycle through all open windows
[Win+Tab]- Flip 3D
[Ctrl+Win+Tab]- Persistent Flip 3D
Taskbar
[Win+Any number (1, 2, 3, .., 0)] - open the corresponding taskbar pinned program
[Ctrl+Click a pinned taskbar icon] - cycle through the program’s open windows
[Shift+Click a pinned taskbar icon] -run a new instance of the program
[Ctrl+Shift+Click a pinned taskbar icon] - run a new instance of the program as administrator
[Shift+Right-click on icon] - Show window menu (Restore, Minimize, Move etc)
[Shift+Right-click on grouped icon] - Show window menu (Restore All, Minimize All, Move All etc)
[Win+T] - Cycle through applications on taskbar (showing its live preview)
[Win+Shift+T] - As above, but in reverse order
[Win+R] - Opens Run dialog box
General
[Win+P] - show presentation mode projector options
[Win+G] - show desktop gadgets
[Win+L] - Lock computer
[Win+X] - Mobility Center
[Win++] - Zoom in
[Win+-] - Zoom out
[Win+=] - Magnifier
[Win+Pause] - System Properties
Windows Explorer
[Alt+P] - Show/hide Preview Pane
[Alt+Up] - Go up one level
[Alt+Let/Right] - Back/forward