I was playing around with Wordle tonight. Here's a Wordle of my Delicious tags. Mostly Twitter keywords. No surprise there, if you ask me. I think I have over 500 Twitter related bookmarks. By the way, check out all of my delicious tags. Mostly Twitter, but some other social media stuff that might be helpful.
As you can see, there are tags for Twitter, Twitterbrands, Twitter101, tools, Politicaltweets, performance/technical, monetization, retweets, search, stats, twitter for social good, celebrities on twitter, and twitter in the news. It's a pretty rich catalog, but I'm sure there are other categories that could be helpful. What else should be tracked?