First of all, finding keywords that are relevant to your products or services is the first step in an SEO effort. If the words are not under high demand for advertisements, the keywords can be more cost effective as long as there is still sufficient search volume. In other words, you want to make sure they keywords are something people use.

The next step is a solid content strategy to employ the keywords in a natural way. I find the SEO Table at search engine land to be the best guide. You can find it at http://searchengineland.com/seotable. The key is to use the good practices, such as incorporating words in your articles and posts as well as URLs, and capitalizing on external sources, such as Social Media. At the same time, you artificially loading up on keyboards.