While iTunes 11 is running a little late, it is expected to drop on us this month. When it arrives, it will be the single biggest change to iTunes since the introduction of the iTunes Music Store. To prepare for this large update, you may want to prepare your iTunes library, adding album artwork, correcting album titles, and getting rid of duplicates. By cleaning up, you’ll have a better experience when iTunes 11 is released and installed on your Mac.
Initially we all had just one Mac and one iPod. We’d dutifully sync our iPod with our Mac, and life was grand.
Then we got a MacBook, another iPod, and finally, an iPhone. Soon it
was apparent that our music library was scattered across multiple
machines and the idea of trying to figure out which machine had which
songs became an onerous task. So we just threw them all together,
resulting in tons of unwanted duplicate tracks.