As I often tell my clients, you must pay attention to your mp3 (or other digital music file format) tagging and titling. As this post mentions, tags & titles on videos are becoming more and more used by search enginges, and I think/know that search for music will also use these things. So in addition to making sure your metadata is correct (ie – your name & the song name are correctly spelled), you should also tag your music files with keywords in the comments section (and basically anywhere else in the file that is appropriate). As always with these things, don’t overdo it, and be accurate and consistent.