Shortcut keys
New in Windows 7
The → symbol stands for the right arrow key, ← for the left arrow key, etc.
Win+↑ - Maximize the current window
Win+↓ - If the current window is maximized, restore it; if the current window is restored, minimize it
Win+← - Dock the current window to the left half of the screen. If it is already docked left, it is moved to the right half of the screen. If it is already docked right, it is restored to its original size
Win+→ - Dock the current window to the right half of the screen. If it is already docked right, it is moved to the left half of the screen. If it is already docked left, it is restored to its original size
Win+Shift+← - Move current window to the left monitor (with dual monitors)
Win+Shift+→ - Move current window to the right monitor (with dual monitors)
Win+Home - Minimize all but the current window
Win+Space - Peek at the desktop
Win+[Plus sign] - Zoom in
Win+[Minus sign] - Zoom out
Win+P - Open the projection menu (generally used for laptops connected to projectors)
Alt+P - In Explorer, show/hide the preview pane
Taskbar Modifiers (New in Windows 7)
Shift+Click - Open a new instance of the program
Ctrl+Click - Cycle between windows in a group
Middle Click - Open a new instance of the program
Ctrl+Shift+Click - Open a new instance of the program as Administrator
Shift+Right-Click - Show window menu
Managing 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
Win+T - Cycle through applications on taskbar (showing its live preview)
Win+M - Minimize all open windows
Win+Shift+M - Undo all window minimization
Win+D - Toggle showing the desktop
Win+↑ - Maximize the current window
Win+↓ - If the current window is maximized, restore it; if the current window is restored, minimize it
Win+← - Dock the current window to the left half of the screen. If it is already docked left, it is moved to the right half of the screen. If it is already docked right, it is restored to its original size
Win+→ - Dock the current window to the right half of the screen. If it is already docked right, it is moved to the left half of the screen. If it is already docked left, it is restored to its original size.
Win+Shift+← - Move current window to the left monitor (with dual monitors)
Win+Shift+→ - Move current window to the right monitor (with dual monitors)
Win+Home - Minimize all but the current window
Win+Space - Peek at the desktop
Win+[Plus sign] - Zoom in
Win+[Minus sign] - Zoom out
Starting Programs
Win+1 - Open the first program on your Quick Launch bar
Win+2 - Open the second program on your Quick Launch bar
Win+n - Open the nth program on your Quick Launch bar
Win+U - Open the ease of access center
Win+F - Open the search window
Win+X - Open the Mobility Center
Win+E - Open Explorer
Win+R - Open the Run window [more info]
Win+B - Move focus to notification tray (the right-most portion of the taskbar)
Win+P - Open the projection menu (generally used for laptops connected to projectors)
Win+Pause - Open the System Properties portion from the Control Panel
Ctrl+Shift+Esc - Open Windows Task Manager
Logging In And Out
While the below shortcuts seem unwieldy because of their length, they're quite easy to remember once you try them out a few times.
Win, →, Enter - Shutdown
Win, →, →, R - Restart
Win, →, →, S - Sleep
Win, →, →, W - Switch Users
Win+L - Locks computer
Viewing Folders With Explorer
Alt+← - Go back
Alt+→ - Go forward
Alt+↑ - Go up a directory
Alt+D - Move focus to address bar
Alt+D, Tab - Move focus to search bar
Alt+Enter - Open the Properties window of the current selection
Ctrl+Mousewheel Change the view type (extra large, small, list view, detail, etc.)
Alt+P - Show/hide the preview pane