Set the Plays ("Play Count" before iTunes v9.2) of the selected tracks to a user-entered number (they will all be set to the same number). If this number is 0 then the Last Played date of each track will be erased. (iTunes has the ability to "Reset Plays" to 0 from a track's contextual menu.)
Also see New Last Played Date and Add or Subtract Play Count.
Change file type to make selected AACs bookmarkable
Send the lyrics of the playing or selected track(s) to TextEdit
Delete characters from the beginning or ending of selected tracks' name, artist, album, comments, composer, or show tags
Change video kind and video related tags of selected video tracks
Display, create text file listing info of dead tracks
Capitalize the first letter of each word in selected track names