[Date (smart)]
Media Center has all sorts of dates it can display. In my Standard Views, I have them all displayed together, largely, hidden over to the right-hand side where I can scroll to them if needed. I've often used the [Year] field as a coarse identifier in the "immediately visible" area of Standard View (that which you can see without scrolling to the right), but this doesn't work well for all media types.
I thought this was pretty low-hanging fruit, since I already have it mostly done for my [Plays] field described in the Custom Watched Field tutorial.
So, here's a great field you can make:
Name: Date (smart)
Display: Date(s)
Flags: All
Expression:
if(compare(math(now() - [Date, 0]), <, 365), FormatDate([Date, 0], MMM dd,), FormatDate([Date, 0], yyyy,))
and, likewise:
Name: Date Imported (smart)
Display: Imported (for both)
Flags: All
Expression:
if(compare(math(now() - [Date Imported, 0]), <, 365), FormatDate([Date Imported, 0], MMM dd, unknown), FormatDate([Date Imported, 0], yyyy, unknown))
Set them both with Right-hand column alignment (or maybe Center) if you add them to Standard View. I like to use the [Imported] version at the head of my "New Stuff" (most recently imported on top) Views I have throughout my Library. And [Date (smart)] has replaced the [Year] column in essentially all of my Views.
Note: I messed this up in my copypasta above at first, and just fixed it. The [Date (smart)] version I find works best if you blank out the "unknown" results, because they're more common cases (not all of my stuff is universally tagged with [Date], or reliable data, particularly among the audio files. However, [Date Imported] should essentially never be undefined, so you want those cases to stick out like sore thumbs, if any exist at all.