best approach to build internal links for seo?

start with the pages you actually want to rank and work backwards. find older posts on related topics that already get traffic and add a link from inside the body text, with an anchor that says what the target page is about (not "click here"). then group things: one main guide per topic linking out to the detailed posts, and those posts linking back up to it. run a crawl now and then to catch orphan pages with nothing pointing at them, those are the ones google struggles with most.