As we all know, Ditko did not give interviews and did not like to talk about his work, saying the work should speak for itself.  So here's something that's pretty rare...  Ditko commenting on the record about his then-current project Shade, as well as his general attitude about the comics industry.  This appeared in the October 1977 installment of Joe Brancatelli's The Comic Books column, which appeared in Warren magazines at the time:

I'm surprised DC has never issued facsimile versions of the two issues of Cancelled Comic Cavalcade.  Sure, they do not consist of DC's finest material, but given their legendary status I'm sure they would sell.  I think about 1/3 of the material in those books has not been published to this day.

I'm not sure where a good place to start with Mr. A is.  I was going to say Fantagraphics' The Ditko Collection V. 1 (1985) but then I did some research and I see that it's become quite pricey in the ten years since I bought my copy.  It's a nice volume that collects the first decade's worth of Mr. A stories, but it's not worth the $50 or more that amazon 3rd parties are asking.  I've heard some sort of Mr. A collection/anthology is forthcoming from Robin Snyder, so maybe it's best to wait for that.

DAREDEVIL #162 penciled and inked by Steve Ditko

Micronauts Annual #2 is interesting because the first ten pages of the story are drawn by Rich Buckler and inked by Ditko.  Then the remainder of the issue is both pencilled and inked by Ditko.  Presumably Buckler originally had the assignment but had to give it up, so his ten pages were given to Ditko to finish, along with the rest of the job.  That makes it an anomaly... to the best of my knowledge, this was the only post-60s instance in which Ditko ever inked another artist.  Kind of a weird combo that doesn't blend well together:

 

1980 also gave us these three issues of MARVEL SPOTLIGHT with Steve Ditko drawing "The hero who could be you!"--CAPTAIN UNIVERSE!  Ditko did some more CU stories that appeared elsewhere--two WEB OF SPIDER-MAN annuals (if not more I don't know about).  I always thought that was a little tricky.  I knew (from somewhere) that Ditko did not want to do new work on his two big characters--SPIDER-MAN and DR. STRANGE!  But Captain Universe and Speedball (at least--Squirrel Girl too?) appeared as back-ups in some SPIDER-MAN annuals!