This is a list of pages that Brian Tomasik would like to see created, improved, or just refined.
This list just scratches the surface of possibilities. There's basically no limit to places you can add important information (or clean up existing information). I'd recommend focusing on whatever topic you care a lot about and/or happen to be reading papers about, rather than writing an article just for the sake of writing an article.
Differential progress: I also recommend focusing on contributions in the realm of social science, ethics, humanities, or popular science rather than on technical details of fields like artificial intelligence. Highly technical contributions may accelerate the risks in addition to helping reduce the risks of disruptive technologies.
Niche articles: Vipul Naik recommends avoiding high-level pages that tend to be edited a lot and instead seeking more niche articles. Thus, when I recommend an article for refinement, I don't necessarily mean focusing on that article itself but rather the kinds of articles in its general neighborhood.