At a Glance
iTunes does its best to let you know when you've got duplicate tracks in your library (File -> Show Duplicates), but it's best simply isn't good enough. Free application Meta-iPod quickly hunts down and cleans out your dupes like it enjoys it. Fire it up, click the Start button to let it analyze your library, and if it finds dupes, click the 2x button to view the duplicates with meta-iPod's best guesses for which you should save and which you should ditch. Then just click the Delete checked tracks button.