Put the keywords to work. It's not enough to just use the keywords in 2-3% of the copy. You need to put the primary keyword in the title of the blog/article, as well as in the first and last sentence. By doing this, the keywords stand out to the search engine crawlers, as well as the eyes of the readers. Remember, the people using search engines are searching for that particular phrase because they want to know more about it/buy it, so it makes sense to give them what they're looking for. You'll get more clicks if you do — it's one of the tricks of the trade for professional SEO article writers.