I tend to bookmark about everything I find usefull. I know it's small but it will grow.

Well here are some of my bookmarks regarding music:

Theory
Chord Progression Theory
Karco - Four Good Ways to Make Yourself Sound Orginal
Ravenspiral Guide to Music Theory

Tutorials
Computer Music - Atmosphere.pdf
Youtube - Chase and Status: Drum and Bass tutorial Part 1
-Part 2
Computer Music - 100 Tips
Blackhole12 - Sytrus Synth Creation
Tweak's Guide

Sample Sites
Soundsnap
Soundproz (I don't know why I'm posting this one. They have cheap sample CDs.)
Atom Splitter Audio
OLPC (Torrent file)
DJ BB's Breakbeat Paradise
Flash Kit
The Recordist
Partners In Rhyme
Sound Effects
The freesound project
Sounds/To/Sample

DJ
Looking to be a Club DJ? (This kind of helps because it displays the recruiters (I can't think of a different title) point of view when they're looking for a DJ to play in their club.)
Virtual DJ (Of course)
-DJ Mixing: Basic - Advanced - Pro

Forums
Newgrounds (Duh)
Virtual DJ (given)
Music Radar
Trancefix
Tranceaddict
Gearslutz
RecordingReview
Studio-Central

Misc.
NG BBS - Audio Tutorial: Mk I
NG BBS - The Best Freeware Thread!
A list of lists by Rig
Ishkur's Guide to Electronic Music v2.5
13 Ideas To Help You If You Are Suffering From Musicians Block
Adam Szabo - Official Website (You'll find tutorial and patches for Sytrus on here.)
Into the world of production (Advice and tips to becoming a producer.)
Mixing On Headphones
Home Recording