Navigate through the tree of knowledge, add new questions or answers, and rate those that have already been asked/answered.
The knowledgebase is a browseable tool for answering questions (like that one). For the moment, it's set up to be maintainable by anyone. If we find it being abused, we'll turn on a moderated question/answer submission process, much like the quotes section of this site. But we'd prefer not to have to do this.