10 keyboard shortcuts You should know

     Using keyboard shortcuts could quickly increase your productivity, reduce repetitive strain, and help keep you focused. For example, to copy text, you can highlight text and press the Ctrl + C shortcut. The shortcut is faster than moving your hands from the keyboard, highlighting with the mouse, choosing copy from the file menu, and then returning to the keyboard.
Below are 10 most popular keyboard shortcuts that I recommend everyone memorise and use 

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 want to highlight one word at a time, 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 saves that file. Use this shortcut key frequently if you're working on anything important in case an error happens, you lose power, or other problem that causes you to lose any work since the last save.

Ctrl + Home or Ctrl + End

Ctrl + Home will move the cursor to the beginning of the document, and Ctrl + End will move the cursor to the end of a document. These shortcuts work with most documents, as well as web pages.

Ctrl + P

Open a print preview of the current page or document being viewed. For example, pressCtrl + P now to view a print preview of this page.

Page Up, Spacebar, 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 spacebar also moves the page down one page at a time.

Ctrl + C or Ctrl + Insert and Ctrl + X

Both Ctrl + C and Ctrl + Insert will copy the highlighted text or selected item. If you want to cut instead of copy press Ctrl + X.

Ctrl + V or Shift + Insert

Both the Ctrl + V and Shift + Insert will paste the text or object that's in the clipboard.

Ctrl + Z and Ctrl + Y

Pressing Ctrl + Z will Undo any change. For example, if you cut text, pressing this will undo it. These shortcuts can also be pressed multiple times to undo or redo multiple changes. Pressing Ctrl + Y would redo the undo.

Ctrl + F

Pressing Ctrl + F opens the Find in any program. Ctrl + F includes your Internet browserto find text on the current page. Press Ctrl + F now to open the Find in your browser and search for "shortcut" to find each time shortcut is mentioned on this page.

Alt + Tab or Ctrl + Tab

Pressing Alt + Tab switches between open programs moving forward. For example, if you have your browser window open and other programs running in the background press and hold Alt and then press tab to cycle through each open program.

Tip: Press Ctrl + Tab to switch between tabs in a program. For example, if you have multiple tabs open in your browser now press Ctrl + Tab to switch between open tabs.

Tip: Adding the Shift key to Alt + Tab or Ctrl + Tab moves backward. For example, if you are pressing Alt + Tab and pass the program you want to use, pressAlt + Shift + Tab to move back 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.