We upgraded our website over two years ago, and since then we've collected 172 posts (173 with this one).
I was doing a little maintenance on the site today and decided to add tags to our existing posts. In addition to the year and month tags we've been using, I added news, opinion, gear, software and fav (for favourite miscellaneous posts). The goal isn't to tag every single post, but to tag those that stay relevant and interesting over time.