Some songs are skipped over/broken on my iPhone; how can I find these?
Finally found an answer to this, thanks to Galley from iLounge!


Create a standard playlist called "Not Missing".
Drag your entire library into that playlist. Missing tracks cannot be copied to a playlist.
Create a smart playlist called "Missing" where:


Playlist - is not - Not Missing
(additional to this post)  Media type - is - Music



You now have a playlist which contains only your songs with the dreaded exclamation mark, and you can re-add them from your original source.