I want to do what Joi does with his Tags and Google

I like the little box Joi uses to categorize his posts via tags. I have no idea how he does this. How any of you are doing this.

I haven't jumped onto the tag bandwagon for a big reason. It may be a misconception on my part, or it may just be part of blogging too soon. My worry is my archives. I have years worth of posts here--over 2000--and if I start tagging from here forward, I would be neglecting some of my most important writing--the earlier stuff. At the same time, I can simply not imagine going back through 2000 posts to classify and tag what has come before.

The tag angel on my right shoulder says, "You should get on board with the taggers sweetheart, if you're not there, then you're not there." The tag devil on my left shoulder says, "Screw tags. You're a poet." The tag angel on my right shoulder says, "Yes, but will it be any easier when you've got 20,000 posts to go back through?" And the tag devil on my left shoulder says, "Don't worry; you'll be dead before then."

How are you responding to your tag devils and angels today?