My "system" is (very loosely!) based on what I derive from the two main classification schemes used by libraries, the Dewey Decimal and Library of Congress. Main categories: Classical, Pop/Jazz, Comedy, Ethnic, etc. Within Classical, arranged alphabetically by composers' last names. In the case of anthology records (containing pieces by two or more composers), which I shelve at the end of the above group, arrangement is also alphabetical, by whichever composer's name comes first in the alphabet. I also have a separate category for solo records, such as trombone, trumpet, oboe (but not piano or voice: nobody ever ever accused me of being consistent!). Within pop/jazz, arrangement is alphabetical by featured performer or bandleader, thus, e.g., Armstrong, Beiderbecke, Dorsey, T., Goodman, Henderson, Hines, Morton, Original Dixieland Jazz Band, Presley, etc., etc. Comedy recordings, as for example Florence Foster Jenkins, Spike Jones, Stan Freiberg, also alphabetical.
Above is for my CD collection. My 78 albums are shelved similarly, except I have far fewer of them. Single 78s I usually arrange within the above categories by principal performer (e.g., Andrews Sisters, Caruso, Galli-Curci, Vaughn Monroe, etc.
Oh well, it works for me---mostly.
