2008 Year-End Lists

Music
Textura: Ten Favorite Labels
Textura: 2008 Top 10s and 20s
Fact Magazine: 20 Best Mixes
Fact Magazine: 20 Best Albums
Fact Magazine: 100 Best Tracks
Fact Magazine: Lists from DJ /rupture and K-punk
Rough Trade: Albums of the Year
eMusic: Best Albums of 2008
eMusic: Philip Sherburne's 12 Electronic Albums
XLR8R: Top 25
The Wire: The Office Dissonance
*I've also posted The Wire's top 50 as an alphabetized artist list in comments.
The AV Club: 30 Best Albums
Resident Advisor: Top 15 Remixes
Resident Advisor: Top 20 Albums
Resident Advisor: Top 30 Tracks
Pitchfork: 100 Best Tracks
Pitchfork: 50 Best Albums
Blissblog: Lists of 8
Philip Sherburne: Comprehensive Blog Post

Books
Amazon: Best Books
Publishers Weekly: Best Books of the Year
NY Times: 100 Notable Books
The Millions: The Year in Reading

Film
Artforum: James Quandt (via Girish)
Roger Ebert: Best Films
New York Film Critics: Awards
indieWIRE: Critics Poll
NYTimes: Manohla Dargis' Top Ten List
NYTimes: AO Scott's Top Ten List
Film Comment: 20 Best Films (Released & Unreleased)

Etc.
Lifehacker: Top 10 Things You Forgot Your Mac Can Do
Planetizen: Top 10 Websites
New York Magazine: The Year in Culture