Parse the selected iTunes tracks' Song Names such that the same first Item text in "First Item - Second Item - Third Item" is removed and copied to another user-selected tag in each selected track (Album, Artist, Composer, Genre, Grouping, or Comments), leaving "Second Item - Third Item" in the Song Name. Run the script again to similarly remove and copy "Second Item" to another tag, and so on. Read Me explains more, and how to customize for different separator characters. Screenshot speaks volumes.
(Note: In order to launch this PowerPC-era script on an Intel machine, it must first be opened and then saved using AppleScript Editor, which is located in your /Applications/Utilities/ folder. More information is here.)
Create a playlist of random Artists and set number of random songs back-to-back
Remove iTunes tracks disassociated from files
Convert selected tracks, export new files to Artist/Album folders
Perform search-and-replace on text in your choice of tags
App displays files in iTunes Media folder which are not in iTunes library
Convert selected tracks and replace them with converted versions