… that purpose is not to make the search engines think our site is better than it is. The purpose is to actually make the site better than it is.
So instead of chasing rainbows by using this or that technique you read somewhere or trying to get away with forbidden practices, concentrate on making your site better. Understand the reasons behind the changes, improve the content, improve the semantics, improve your incoming links and most of all make your site better for your visitors. It may involve a lot a work, but the satisfaction of accomplishing something through hard work rather than gaming the system might feel just as good.