I have been wondering how society can benefit from music services like Spotify. What comes to mind is the relaxing effect music has. Now you cant just label any particular kind of music relaxing. It may vary greatly from person to person and his or hers state of emotion.
I don't know if this works but you could collect lists of songs from users that they tag with 'These songs help me when I'm feeling' sad, angry and so forth.
Of the millions of listeners of these services there has to be at least a dozen of whom you get an emotional match.
This way you also know you are not alone.