How to spy keyword

Use http://www.spyfu.com to spy blogs for their keywords.

Write an effective article

If your keyword is "buy penny stock", then you need to have the keyword in your title, and appears three times in your article. I should also appear in the first paragraph. Have the keyword bold. Your title must also attract people to read it. So for "buy penny stock", you can write "how to buy penny stock that double your money"

Unable to monetize keyword

There are three excelent keyword that drives lots of traffic:

• Book
• Music
• Song

But I couldn't monetize it. How should I monetize it?