The most useful tips are sometimes the easiest to pull off, and this one
from ryerye at Mac OS X Hints definitely falls into that camp. It turns out that iTunes' Album column can also sort with "Album by Artist" and "Album by Year." That second option is especially nice, since it's actually a 'Sort by Artist by Album Year.' All you need to do is keep clicking on the Album column to get whichever option you prefer; no extra modifier keys and no obscure tricks, though no documentation either, as far as I can tell.