OS X 10.8 and later only. This script checks your entire iTunes library for missing and presumed dead tracks--those tracks that iTunes is unable to associate with a file and which are listed in iTunes with a "!"--and can create a text file listing these tracks by alleged File Path (if available), Song Name, Artist and Album, which you can view using TextEdit.
Also see Music Folder Files Not Added
To find and delete dead tracks see Super Remove Dead Tracks.
See the video on YouTube.
iTunes can't find the files pointed to by the Location property of these track entries.
Correct song titles listed as "Artist - Song Name"
Remove iTunes tracks disassociated from files
Set the Plays of selected tracks.
Create a PDF booklet containing info from the selected tracks
Display, create text file listing info of dead tracks
Locates pairs of track entries pointing to the same file