Skype is an IP telephony service provider that offers free calling between computers and low-cost calling to regular telephones that aren't connected to the Internet. Included in the free service is a softphone application that can be downloaded to any laptop or desktop computer, or other computing device running Windows, Macintosh, Linux, or Windows Mobile operating systems. A function called SkypeOut enables calls to regular telephones; these calls are charged to a prepaid account or to a flat-fee annual subscription.

Here we go ....

1. First you have to do is open Synaptic Package manager, goto System->Synaptic Administration->Synaptic Package Manager.
2. From Synaptic, go to Settings->Repositories. Click on Third Party Software Tab. Click Add, and put on this line :
   

   
   deb http://download.skype.com/linux/repos/debian/ stable non-free

   Click Add Sources.

3. Click Close, and Click 'Reload' at the top of Synaptic.

4. Go to terminal Application->Accessories->Terminal and type
    

   
   sudo apt-get install Skype
   

   Then go to Applications->Internet->Skype

   Enjoy!