One of the things I took away was that I needed to be monitoring things like PasteBin. If you monitor security websites, you probably recognize Pastebin as a popular place for hackers to post pilfered data, though the site has many more worthwhile uses. I was surprised to find computer system data for an old employer of mine (including usernames and passwords!).
Getting it taken down was easy enough, but I then went out and found PasteLert, which gives me alerting on any search terms that I plug into it. I can even pipe them into an RSS feed so I can read them along with my daily news in Feedly, which is pretty great.
I highly recommend that everyone looks into ways to find leaked data about your organization!