I’ve signed up for an excellent service at Last.fm, an on-line music-based community and somewhere to find, and stream, new and old music.
You can add plugins to your media player (like iTunes for instance) that allow you to display which tracks you’ve recently listened to. I’m still fiddling around with these tools, but in the meantime here’s an example of the things that can be shown from there:
I’m about to subscribe to get some extra features too. Give it a look.