An attractive title, intelligenlty placed keywords thorughout the body of the article are wonderful. But, still, what draws readers and keeps them coming back is really good matter. If a person has good articles, that are not boring, are useful or interesting, are well documented and well-researched, or show knowledge in a particular area of interst, or simply move the reader (if you are narrating personal experiences), you might not be that good at keywords and the rest of it, and still get the traffic you need. Ultimately, writing talent and enthusiasm for sharing cannot be manufactured by search engine optimization, it can be promoted by it, but not created by it. So, do your best, and then relax.