Individual SEO tactics will come and go but the fundamental SEO strategies still apply.
One of my SEO strategies is to generate as many pathways for my target market to find my site. This can be backlinks from relevant sites, being mentioned in newspaper articles, providing free tools for other relevant sites to use, etc. From year to year the "pathways" may change but the need to generate the "pathways" and the quality signals they generate for Google stays the same. Even if they didn't generate quality signals for Google I would still do it since these pathways builds up my direct traffic which makes me less dependent on Google.