I'm a bit picky about itunes being organised so for example:
A2008 GUILTY
A2009 NEXT LEVEL
B2003 A BEST
B2003 A BALLADS
L2007 ASIA TOUR ~A Tour of Secret~
L2009 ARENA TOUR ~NEXT LEVEL~
LA2009 a-nation '09
R2008 Ayu-mi-x 6 -GOLD-
RS05 excerpts from ayu-mi-x III: 01
RSG05 M
S43 Mirrorcle World [YOU Version]
S45 Rule/Sparkle
All of them are a letter followed by the year or single number
A= Album, B = Best Album, L = Live, LA = Live a'nation, R = Remix Album, RS = Remix Single, RSG = German Remix Single, S = Single
So yeah I have the whole disography in FLAC arranged like this, there might have been some i forgot haha, i like it being in a chronological order