Anyone can sign up, log on, and add to and edit the San Francisco Wiki. While there are a few tips and tricks to learn, it's pretty easy, and you can easily edit without having to learn anything.
If you want to practice editing you can play around in the Wiki Sandbox, or you may first want to check out our Quick Wiki Tips. We also have a list of All Pages in the wiki.
Feel free to make new pages — and try to remember to link them. Also, if you don't know where to start or don't have any ideas, check out Wanted Pages.
To see the most recent edits made you can look at the Recent Changes page. Also, be sure to check your userpage as people will at times leave you comments on there.
