The all new principles of SMO, Focus on the user and all SEO will follow.
It seems like there is some confusion. SEO is not dead and being
replaced by SMO. And having great SMO does not lead to better SEO. The
only similarity is that they sound alike and they both have to do with
"optimization" to increase traffic. That's where the similarities end.
One targets search engines through technical techniques. The other
encourages "viral" shares on social media through engaging the reader.
In fact, I think it's better if you just don't put them together like
you do with SEO/SMO. They are different domains of knowledge. SEO/SEM
makes sense because they're both about search engines.