Yes, I'm doing both. I will try to make it interesting and non-obvious.
100: Well-Placed Credit Songs
I know this is pretty simple, but a well placed song in the opening or closing credits can really be effective. For example, "My Baby Shot Me Down" in Kill Bill. It fit's perfectly, and it really make s the credits memorable and opens the movie well. When combined with imagery, it makes the credit sequence a good way to ease into the movie, and it's a million times better than the standard opening credit sequence. Also, a well placed song in the closing credits can be just as effective. For example, Amphibian by Bjork in the closing credits of being John Malkovich. It's the perfect song to end the movie with, and it actually fits the movie well, unlike most ending credit songs.