Hackpad's search functionality is pretty good at ensuring that people find what they need. We do also maintain a Table of Contents pad, which serves as a central place that links to all our canonical content; this helps people find what they need by browsing. This ToC pad is pinned to the top of the Engineering Wiki collection.
One guiding principle we've followed is to favor long wiki articles so that it's easy to see a list of everything you can access from that one Table of Contents. Each pad is then well-organized so that you can search within the article to find what you need. We used to have lots of articles that each addressed just one thing, but that made it hard to locate the right article when you needed it.
Sometimes content gets duplicated, but we just clean that up when we notice it. So far it has not been a big deal.
One guiding principle we've followed is to favor long wiki articles so that it's easy to see a list of everything you can access from that one Table of Contents. Each pad is then well-organized so that you can search within the article to find what you need. We used to have lots of articles that each addressed just one thing, but that made it hard to locate the right article when you needed it.
Sometimes content gets duplicated, but we just clean that up when we notice it. So far it has not been a big deal.