OS X 10.8 or later. Set Last Played/Last Skipped date of selected tracks to a new date, with option to increase or decrease Plays/Skips, or set to no date and no Plays/Skips.
Also see Add or Subtract Play Count.
Like so. The Last Played date of the selected tracks will be set to June 10, 2014 at 9:45AM and the Plays will be decreased by 3. The latter is an option that can be toggled on and off with the checkbox.
Remove selected tracks and Trash or delete their files
Deletes the lyrics of every track in the Music playlist
Convert selected tracks and export the converted files to a new folder
Export album artwork as folder.jpg to Album folder
Export files of tracks in two or more playlists to single folder
Create text file listing tracks common to and exclusive to two playlists