I think there should be a simple rule for "related" links: make them actually link to related things. I just looked up some lyrics on a site, and this is what it said at the bottom:
Visitors interested in The Dresden Dolls Lyrics may also interested in:
- Green Day Lyrics
- My Chemical Romance Lyrics
- Good Charlotte Lyrics
- Eminem Lyrics
- Avril Lavigne Lyrics
- Mariah Carey Lyrics
- ...
Now, if it's automated, I can understand getting a few wrong, but there's something really wrong about suggesting a bunch of pop divas known for hollow lyrics, a rap star, and an altrock band, when the source page is lyrics for an obscure, angry, instrument-and-voice duo who've opened for bands such as NiN.
Let's see, folks, "popular on this site" is not the same as "related to this page". It baffles me that people can be that dense when designing a site.