For every keyword you have in hand, you want a page that is keyword-focused and at the same time provide useful information.

If you are passionate about the topic, that is not hard to do.

Alternatively, you can hire ghostwriter to write for you. Elance and RentACoder are just two marketplaces where you can post projects and let project takers bid for them.

Care should be taken when hiring authors. You want them to write interesting content. Notify them up front that you need the articles to be keyword rich. Not in a way that you stuff keywords all over the place, but enough to let search engine spiders know that the page is about a keyword or keyphrase.

I recommend against an exact keyword density. Just write naturally while keep in mind about your primary keyword. Don’t forget to insert some synonyms or related keywords as secondary keywords.

Basically, just focus on your readers. Search engine crawlers will adapt. We begin to see that happening now.

Content writing is a huge topic. Don’t limit yourself but keep exploring. There are private label content that you can based your content idea on (not copy and paste!). Other sources of content include public domain materials, free articles, viral content, and so on.