Emule mainly, occasionally Utorrent if I cant find it on Emule.

Tech bought us a Ruckus account which has almost every CD every made, the only gheyness is that they're all copyright protected WMA files so it takes 2 separate programs to strip the copyrights and change format to an mp3 (then you have to create the ID3 tags). Its a last resort just because its so tedious but good for older CDs that arent shared much anymore.