There's also https://news.ycombinator.com/yli.html, which is the guide for YC startups who want to launch on Hacker News. The formal mechanism is YC-only but the principles apply more broadly.
Apart from show vs launch I think following the guidelines and hoping for the best is the norm. Launch HN is nice to get a one-time boost but it doesn’t confer any long-term special treatment on your post afaict.