I’d add one thing to number 5: Writing good copy is crucial not just for your Title/snippet, but for your whole page, especially your landing page. You want people to stay on your page for a while and (hopefully) even navigate to other pages you have. Google looks at bounce rate and where they go after they hit your page. Learning to write good copy can not only increase conversion (if you’re selling something) but make your content more impactful and engaging. There are free books at most libraries or online to help.
Think of it this way: The more specific your content, the more specific the needs of your audience are -- and the more likely you'll convert this traffic into leads. This is how Google finds value in the websites it crawls; the pages that dig into the interworkings of a general topic are seen as the best answer to a person's query, and will rank higher.
Thank you so much for these great SEO techniques you posted on your blog. I also follow you on your youtube and listened to almost all of your videos and sometimes I re-listen just to refresh my mind. Because of your techniques, we managed to bring our website to the first pages within a month. Adding external links was something I never imagined that it would work. But it seems like it is working. Anyway, please accept my personal thank you for coming up with and sharing these techniques. I look forward to your new blog posts and youtube videos!