Clever usage of keywords in proper places within the material in fact helps in optimization. Like all optimising, it's an ongoing process and topic to the impulses of positioning.
There are two main tools you can use for this - Google AdWords Keyword Suggestion Tool or Wordtracker.
Facing issue in account approval? email us at info@ipt.pw
Click to Ckeck Our - FREE SEO TOOLS
Dinosalcid