You don't have to adjust your track information on a song-by-song basis. You can edit an entire album's tracks simultaneously by clicking the Album name in the iTunes browser (or on its cover in Grid View) and pressing Ctrl+I (⌘-I) to bring up the Get Info box.
Ever careful, iTunes flashes an alert box asking if you really want to change the info for a bunch of things all at once. Click Yes.
You can make all sorts of changes to an album in the four-tabbed box that pops up. Here are just a few examples:
❶ Fix a typo or mistake in the Album or Artist name boxes.
❷ Manually add an album cover or photo of your choice to the whole album by dragging it into the Artwork box.
❸ Click the Options tab and change the Equalizer preset for all the songs.
❹ Have iTunes skip the album when you're shuffling music—great for keeping winter holiday music out of your summer barbecue album rotation.
❺ Tell iTunes to play back the album without those two-second gaps between tracks by choosing the "Gapless album" option. (Perfect for opera and Abbey Road!)