I actually modified this as a base for a music piece.
1: The underlying theme
2: Melodic theme
3: Rhythmic theme (could be an ostinato, could be complicated. Depends on the card)
4: beginning of the piece
5: middle of the piece
6: end of the piece
7 and 8: Two emotions the piece should convey
9: The overall mixture of these two emotions, what should the audience feel at the end of the piece?
It did great for a short drum corp piece, now I'm going to try a string quartet...
Also, typically my types of pieces are atonal (most of my inspiration comes from Bartók), but if you feel inspired to choose a key and stick with it, I'm sure you could find it in the cards