When you have the Store features turned on in iTunes, you always see a gray arrow icon to the right of the Artist and Album name, which takes you to the iTunes Store when clicked. If you hold down the Option key while clicking on these arrow icons, you're instead shown a list of the relevant items from within your own music Library rather than on the iTunes Store. If you Option+Click the Song Name or Album arrow, the list will show you all the songs on that Album. If you Option+Click on the the Artist Name arrow, the list displays all of that Artist's music. This is pretty handy. Maybe I'm just pointing out an obvious feature that everyone else knows about, but, I just figured it out today.