Music filing

I spent a few hours last night trying to re-file stacks of sheet music pulled from my private collection last semester. In addition to two levels of string classes (select 6-8 pieces and use 3-4) and my private students,  I also often fish-out requests for other teachers and friends. Then everything gets thrown in the "re-file box" until nothing more will fit. Now have two boxes worth and need to find a quiet day when I can work uninterrupted to put my music library back in order... until the end of the school year anyway.