The big secret is there is no secret—Keyword Basics(SEO).

Start finding the keywords you need to succeed online business.

A single keyword can be pure marketing gold, delivering more qualified website traffic, more conversions and more revenue for your business. So just imagine how your bottom line would benefit if you could find dozens, hundreds and even thousands of new, high-impact keywords and terms! So keywords plays a important role in online business. And now I got some pdf doucuments from the Wordtracker. List them below, Hope they benefit you.
Wishing you every success online.

Part 1: How search engines work
http://www.wordtracker.com/keywordbasics/keyword-basics-lesson-one.pdf

Part 2: Discovering the keyword matrix
http://www.wordtracker.com/keywordbasics/keyword-basics-lesson-two-ak.pdf

Part 3: Choosing your best keywords
http://www.wordtracker.com/keywordbasics/keyword-basics-lesson-three-yz.pdf

Part 4: Using keywords in website copywriting
http://www.wordtracker.com/keywordbasics/keyword-basics-lesson-four-ss.pdf

Part 5: How in your final Keyword Basics lesson:
http://www.wordtracker.com/keywordbasics/keyword-basics-lesson-five-gh.pdf