How do you organize your music?

I use a folder structure since it was the best option when using ogg files on my D2.

<genre>/<album artist>/<album>

I use <album artist> as a proxy for a series/movie/game name for soundtracks. For instance, all my Bakemonogatari tracks are under "Anime/Bakemonogatari/<album>" while Joshua Tree would be under "Rock/U2/Joshua Tree". It's probably not the most ideal way of doing, but it's relatively simple and works for me.

Setting it all up was a major pain, but once it was done maintenance is fairly easy. For playing, maintenance, and syncing I use MediaMonkey Gold. Only reason is since it became an all-in-one app for me since it can convert on the fly when syncing. Only other program I use frequently is EAC for my ripping.

I have a lot of digital music over 350gb and it is organized as such:

Genre
>Artist
>>Album
>>Album
>>Album

ect

I have about 1.8 TB worth of music, itunes is actually very great if you're using Mac. Windows users i wouldn't advice it, i'm sure a lot of members know this already, but i just sort my music by album name. It's makes me memorize my music a little more and forces to be more i suppose "in touch" with what i actually have in my directory.

Not really.. quite fine with using itunes on windows personally.
Found it quite useful and versatile enough.

Mine, storing in folder in harddrive:

<file type, lossless or mp3>
<artist/album>

In media player (foobar):

playlist
<artist: album>
<artist: album>
......
<collection of jazz/ OST etc.>

I don't listen to much music so that is how I organized it

it's simple for me. i keep it by genre->artist->album->song

i use mpd+gmpc under linux so it's pretty good for me. its lightweight and fast and works very well as long as all my files are under one main folder.

The answer is simply: ITUNES

I like to keep things simple, so I let iTunes organize my music according to its structured analysis of my metadata. It keeps my music files organized automatically into album and artist folders, and it names those files according to disc number, track number, and song title. It also adds genre information and album artwork and other changeable and non-changeable sorting parameters, then adds my personal ratings and playback habits to form my own unique, dynamically updated relational database, with "compilation discs grouped separately for browsing", which is optional. Everything is in ALAC, but once in awhile I will build a playlist for the purpose of batch-converting the songs into 320kbps Mp3s to transfer to a micro-sd card for my Nokia; once transferred I delete all the Mp3s immediately to avoid duplicates. Keeping said playlist for reference is optional. When I clone my master music hard drive, I can open up a brand new copy of iTunes on another computer and everything will be sorted the same, automatically.

Folder tree in music folder looks like so...

Albums\Artist\Album (full albums that don't fit in the three following folders)
Classical\Artist\Album
Jazz - Electronica\Artist\Album
Soundtracks\Album
Unsorted (orphan tracks here)

artist > Album > album number - song name . extension

Though I usually just get Windows Media Player to do the organization for me

Drive:\Music\AlbumArtist\[ReleaseYear] AlbumTitle\(DiscNumber if applicable)TrackNumber SongTitle.extension

My media player of choice catalogs all the genre information, each album contains at least two or more values, so there is no need to sort it on my drive as such.

In a folder and file structure like this:
Codec (ALAC, AIFF, ..)\Artist\Album\Track#. Song_title.ext

I use J River Media Center to organize my library. All the files are tagged as necessary to make my system work.

The directory structure for the files actually changes as I decide to do things differently from time to time. JRMC makes it easy to rename and move all files. So every once and a while I'll decide that files aren't organized right and do a bulk move and rename. It's easy and harmless. JRMC keeps the playlists and other things intact after a rename like that.

One trick I've discovered though is to do a naming scheme that keeps the pathname and filename from getting too long. That can be a problem with classical music especially, but sometimes with popular music as well. If the pathaname and filename get too long you may find that you can't copy a folder to a thumb drive cause the thumb drive is some flavor of FAT and can't handle filenames as long as NTFS. You can have similar problems with copying a folder to a data CD/DVD.

So I've developed a naming scheme that attempts to keep filenames from getting too long.

JRMC allows the use of functions in defining file names similar to how you'd use functions in a spreadsheet (Foobar can do similar).

My directory rule looks like:
[GeneralGenre]\[File Type]\[Album Artist (auto)] - [Album]If(IsEmpty([Disc #],1),,-PadNumber([Disc #],2))

My filename rule looks like:
Mid([Album Artist (auto)],0,20)-Mid([Album],0,20)-If(IsEmpty([Disc #],1),,PadNumber([Disc #],2))-PadNumber([Track #],2)-Mid([Name],0,20)

GeneralGenre is a custom tag filed that consists of [blues, christmas, classical, jazz, organ, other, rock]

So for example with Pink Floyd "The Wall" I end up with:
LIB\rock\flac\Pink Floyd - The Wall [MFSL] (Disc 1)-01\Pink Floyd-The Wall [MFSL] (Dis-01-03-Another Brick In The.flac

The general form being:
LIB\[GeneralGenre]\[file type]\[Album Artist] - [Album]-[Disc#]\[Album Artist]-[Album]-[Disc#]-[Track#]-[TrackName].extension

Still a little verbose. I may change it all again to be less verbose. I seem to change it all about once or twice a year anyways.