So when I did my flash-and-poetry boot camp, I generated more ideas than I was going to need so I could pick and choose ... but not too many more, so I wasn't left dithering.
There was one idea that I put down and didn't end up using, but I think it's a good concept overall, so I bequeath to anyone who cares to borrow.
The idea is this: take a metaphorical song lyric and interpret it literally. For my boot camp, I decided to pick a specific lyric ahead of time ... and as soon as I did that, I couldn't find a lyric to suit me. Before that, it seemed like every other song jumped out at me with, "If you take that literally, it's an interesting concept." As soon as I started looking for one ... boom. Nothing.
I finally ended up with a bit from Rihanna's S.O.S: "I'm lost, you've got me looking for the rest of me." Though glancing at the song, "I'm the question, and you're of course the answer," has possibilities, too ...
(This song also falls on my "misheard lyrics" list: at first, I would have sworn she was saying, "This timepiece baby come and rescue me" even that makes no *sense*, but it sounds a lot more like "piece" than "peace." And I suppose animate heroic clocks would make a good story ...)
So there's your story spark: cherry pick a lyric from your usual listening fare that is intended to be a metaphor, figurative image, etc ... and interpret it in literal fashion.