I had this idea the other day on Arch Linux's wiki page. In that community, they have an extremely comprehensive wiki for learning and troubleshooting on your own in addition to a very active forum which is similar to PF now. The idea of have and FAQ section is an old one, but the best thing on PF (to my knowledge at least) are threads containing links to other threads organized mostly (or only) by discipline. Ex. https://www.physicsforums.com/threads/math-faq-list.807539/ Obviously I am aware that wikipedia exists, however that is more of an encyclopedia than a wiki which is used to help "troubleshoot" or help the struggling user understand a concept (my opinion). A physicswiki, if you will, alongside a physicsforum I think would be extremely beneficial in the long run accumulating and organizing explanations (so that each explanation is refined as opposed to lost on old threads). Additionally, I think it will save PF members time not having to re-explain reoccurring questions.