Great Article On DownloadSquad about some really cool Keyboard Shortcuts.

Ctrl+T — opens a new tab in all major Web browsers.
Alt+Tab — cycles through currently-open programs. If you also hold down Shift, it cycles backwards.
Ctrl+Tab — cycles through Web browser tabs (you can use Shift to go backwards too).
Ctrl+W — closes the current window or tab. Some applications can be closed with Ctrl+W, but Alt+F4 is universal.
Ctrl+C and Ctrl+V — copies selected text (you can use Shift and arrow keys to select text!), and then paste it. Use Alt-Tab to switch between source and destination for bonus points.
Ctrl+Z — undoes your last action. This works in almost everything except Web browsers. ‘Redo’ varies from program to program (check the ‘Edit’ menu to find out!)
Ctrl+Mouse scroll wheel — zoom in, zoom out. This works in almost every kind of app, including Web browsers. Great for increasing the size of tiny ‘aesthetic’ text on normal websites… or tiny thumbnails on nefarious ones. Also scales the size of icons on your desktop, if they’re too small for you!
F5 — refreshes your current folder/directory or Web page. Yes, you can hammer a button on your keyboard rather than foolishly clicking a button over and over!
Alt+D — selects the address bar in your Web browser or folder/directory view! Yes, I know — how awesome is that?

If you can use your mouse to do it, you can probably use your keyboard to do it. Below is a list of keyboard shortcuts.

• CTRL+C (Copy)
• CTRL+X (Cut)
• CTRL+V (Paste)
• CTRL+Z (Undo)
• DELETE (Delete)
• SHIFT+DELETE (Delete the selected item permanently without placing the item in the Recycle Bin)
• CTRL while dragging an item (Copy the selected item)
• CTRL+SHIFT while dragging an item (Create a shortcut to the selected item)
• F2 key (Rename the selected item)
• CTRL+RIGHT ARROW (Move the insertion point to the beginning of the next word)
• CTRL+LEFT ARROW (Move the insertion point to the beginning of the previous word)
• CTRL+DOWN ARROW (Move the insertion point to the beginning of the next paragraph)
• CTRL+UP ARROW (Move the insertion point to the beginning of the previous paragraph)
• CTRL+SHIFT with any of the arrow keys (Highlight a block of text)
• SHIFT with any of the arrow keys (Select more than one item in a window or on the desktop, or select text in a document)
• CTRL+A (Select all)
• F3 key (Search for a file or a folder)
• ALT+ENTER (View the properties for the selected item)
• ALT+F4 (Close the active item, or quit the active program)
• ALT+ENTER (Display the properties of the selected object)
• ALT+SPACEBAR (Open the shortcut menu for the active window)
• CTRL+F4 (Close the active document in programs that enable you to have multiple documents open simultaneously)
• ALT+TAB (Switch between the open items)
• ALT+ESC (Cycle through items in the order that they had been opened)
• F6 key (Cycle through the screen elements in a window or on the desktop)
• F4 key (Display the Address bar list in My Computer or Windows Explorer)
• SHIFT+F10 (Display the shortcut menu for the selected item)
• ALT+SPACEBAR (Display the System menu for the active window)
• CTRL+ESC (Display the Start menu)
• ALT+Underlined letter in a menu name (Display the corresponding menu)
• Underlined letter in a command name on an open menu (Perform the corresponding command)
• F10 key (Activate the menu bar in the active program)
• RIGHT ARROW (Open the next menu to the right, or open a submenu)
• LEFT ARROW (Open the next menu to the left, or close a submenu)
• F5 key (Update the active window)
• BACKSPACE (View the folder one level up in My Computer or Windows Explorer)
• ESC (Cancel the current task)
• SHIFT when you insert a CD-ROM into the CD-ROM drive (Prevent the CD-ROM from automatically playing)

So you have Windows 7 and have been using it for a few months but do you know some of the shortcuts?

Here they are:

• Win+Home: Clear all but the active window
• Win+Space: All windows become transparent so you can see through to the desktop
• Win+Up arrow: Maximize the active window
• Win+Down arrow: Minimize the window/Restore the window if it’s maximized
• Win+Left/Right arrows: Dock the window to each side of the monitor (If you’ve got dual monitors, adding Shift to the mix (e.g., Win+Shift+Right arrow) will move the window to the adjacent monitor.)
• Win+T: Focus and scroll through items on the taskbar.
• Win+P: Adjust presentation settings for your display
• Win+(+/-): Zoom in/out
• Shift+Click a taskbar item: Open a new instance of that application