Percussion 1,2 - Drums...Bass...rhythm 1,2 - guitars, Pad chord - strings, melody 1,2 - special effects or inserts.
8 tracks in the accompaniment
1 lead track, 1 track supplementing the lead etc.
In a typical song, I can easily break up 7-8 tracks and hear them individually. I think this is a great concentration exercise and it really helps you get deeper into the music.