You may question why any site owner will set up an article directory site and accept all articles for free, but these sites can become very popular, and the more traffic that the site generates, so too is the potential to gain revenue from the site from paid adverts from the likes of Google, so it’s a win-win situation for both the site owner and the writer of the article.
The amazing thing here though is that the book is a free download, with no catches at all, and it was so riveting I made notes to refer back to later when I need to put everything into practice for myself.
That book is called Building a Business, not a Blog.
There are some very good keyword research tools available, but Google kindly offers a free tool, which they have just recently upgraded to show a monthly estimate of searches made for each keyword.