This stay-open applet watches your playing tracks and when an un-rated track starts playing displays a window with a demand it be rated.
While you could easily rate the current track from the iTunes icon in the Dock, this script interrupts you and compels you to do so.
OS X 10.6 or better only. Previous universal version available at the link below in the "Info" section.
This window will pop up when a new song begins playing.
Re-associate batch of dead tracks with files from selected folder
Copy files of selected tracks to playlist-named folder
Capitalize the first letter of each word in selected track names
Set the bookmark pointer of selected tracks to 0 seconds
Delete characters from the beginning or ending of selected tracks' name, artist, album, comments, composer, or show tags
Display, create text file listing info of dead tracks