Creating a website is not a difficult task but making it popular requires a lot of efforts.The location of keywords is very important for good ranking of the site in major search engines. To take matter a step further we should first identify the keywords. They can be found out by finidng the words which the user enters when looking for data availible on that topic through search engines. To help u with this a very useeful site
http://www.webconfs.com/ is availlible. It provides variety of tools for keyword optimization.and also other facilities to do optimization of your site. All in all an essential tool tobe used by web site creator for optimization .