SomeCallMeChris wrote:

I play for passive-listening stories from hukumusume, songs, and audio tracks from anime or dorama. Pretty much every thing I play for passive listening is something that I've been through before ... generally I've read the story/lyrics/L2 subtitles at some point.

I do this with my favorite Jdorama too (BOSS, Shinsengumi, Galileo, etc). Because I am already familiar with the stories, I can now attempt to listen to the conversations without looking at the subs and test myself on how much I actually understand when an episode ends.