How much keywords used in a article. Can i point different website on same article
Your questions are not clear.
I suggest you look at the links provided in this post, which cover most aspects of keyword strategy: http://www.sitepoint.com/forums/showthread.php?1185221-Keywords-Essentials
After that, if you have a specific question which remains unanswered, or a point you don’t understand, please feel free to post again. Meanwhile, thread closed.