IMO, Bitt's naming format is the best. The others that have been suggested here don't seem very good in my mind. Without the Artist - CD Title - Track # - Track Name.mp3 format, if you have any files from different CDs in the same directory, they won't be in a good order. With this format, you could combine all your MP3s together and you could still have them in order.

I'm not saying you would frequently mix all your files, but even if you didn't, that naming convention makes the most sense to me.