Algorithms change, foundations do not. The technical, content and authority basics worth getting right first.
Search engines still need to crawl your pages, understand what each one is about and see that other credible sites reference you. Most ranking problems trace back to one of those three.
Give every important page one clear job and one primary search intent. Pages that try to cover everything rank for nothing.
Fix the technical foundation once — indexing, speed, internal links, structured data — then spend your ongoing effort on content and authority.