Sorry I missed your comment. You need to take a look at the competition for your keyword and see who is ranking on page one. If you find that the page is full of high-powered sites, look for less competitive keywords and test them in Surfer.

Ideally, you should be working with a keyword cluster. This means having about 20 high-functioning keywords that support each other. They should be interlinked on your site.

I'll cover this topic in an upcoming article.