Ctrl + C or Ctrl + Insert :
Copy the highlighted text or selected item.
Ctrl + V or Shift + Insert :
Ctrl + Z and Ctrl + Y :
Undo any change. For example, if you cut text, pressing this will undo it. This can also often be pressed multiple times to undo multiple changes. Pressing Ctrl + Y would redo the undo.
Ctrl + F :
Open the Find in any program. This includes your Internet browser to find text on the current page.
Alt + Tab or Alt + Esc :
Quickly switch between open programs moving forward.
Tip: Press Ctrl + Tab to switch between tabs in a program.
Tip: Adding the Shift key to Alt + Tab or Ctrl + Tab will move backwards. For example, if you are pressing Alt + Tab and pass the program you want to switch to, press Alt + Shift + Tab to move backwards to that program.
Tip: Windows Vista and 7 users can also press the Windows Key + Tab to switch through open programs in a full screenshot of the Window.
Ctrl + Back space and Ctrl + Left or Right arrow :
Pressing Ctrl + Backspace will delete a full word at a time instead of a single character.
Holding down the Ctrl key while pressing the left or right arrow will move the cursor one word at a time instead of one character at a time. If you wanted to highlight one word at a time you can hold down Ctrl + Shift and then press the left or right arrow key to move one word at a time in that direction while highlighting each word.
Ctrl + S :
While working on a document or other file in almost every program pressing Ctrl + S will save that file. This shortcut key should be used frequently anytime you're working on anything important.
Ctrl + Home or Ctrl + End :
Move the cursor to the beginning or end of a document.
Ctrl + P :
Print the page being viewed. For example, the document in Microsoft Word or the web page in your Internet browser.
Page Up, Space bar, and Page Down :
Pressing either the page up or page down key will move that page one page at a time in that direction. When browsing the Internet pressing the space bar will also move the page down one page at a time. If you press Shift and the Space bar the page will go up a page at a time.