Yu Yu Hakusho Links

Yu Yu Hakusho Fanfiction Guid
A humerous and all-too-true guide to the world of Yu Yu Hakusho H/K fanfics. They also have a fanfiction section. But that's not as important as the hillarity of the Yu Yu Hakusho Fanfic Guide

Dying Demon
A fanfiction database wherein Kurama, Hiei, and Yusuke are mixed to varying degrees of pairing-dom. Most of it is PG-13 or up.

Firedancer's Yu Yu Hakusho Fanfiction
Pretty good, anything marked +18 requires a password, but if you email her, she'll send you that. Blood Call is pretty good, if a little Mary-Sue-ish.

Green Grapes and Lemonade
A H/K fanfic contest now laid to rest, but the fiction is still there.

Morgan D's page of Fanfiction
Just a bunch of fanfics from various writers.

Star Mirage's Library
Another fiction haven. A lot of bum fics, but there are a lot of good ones, too.

Obsessive Adoration
This lady writes the BEST Yu Yu Hakusho fics EVER! However, I do believe she has stopped writing for this fandom.

YYH Fanfiction Bookstore
Thsi used to be the authority on YYH fanfiction, or so I was told. Now it's just...there.

Another library
I haven't actually read many on this site, so I have no input. If you aren't already a member of Aestheticism.com, I wouldn't recommend trying to view their NC-17 stories, which are hosted at said site. They require you to mail them evidence that you are of legal age, which is ridiculous and dangerous.

East of Sanity
UT has some good stories, but she, also, has moved on.