I've started a new concept this month where I match spells from the Harry Potter series with music.
The Lumos playlist contains music that involves around light and dark
The Petrificus Totalus playlist with music about fear, standing still, ...
The Avada Kedavra playlist only has music from artists who past away
The Episky playlist with music about fixing things, curing, living/dying, ...
In some playlists the connection is more visible then in others.
And so on!