SEO isn’t an exact science, nor is it an art. (In fact, it’s somewhere in between.) A better description is that it’s a process of trial and error, and every website’s different – so it’s often hard to pin down specific things to do and not do.
That said, we can point to some specific SEO mistakes to avoid – while our top blog SEO tips should provide a good place to start in terms of search-engine best practices.