It seems simple enough to say that I am overextended. Somehow, though, I have seen all the expectations as manageable--if I could only figure out the perfect answer/tool/whatever. But the reality is perfectly encapsulated by this:
My problem wasn't that I was insufficiently efficient. The problem was that I was way too overextended. I had taken on more than even a very efficient person could handle. Efficiency is great, but it can only get you so far.
End of story. I can't say it any better.
And now, with Banana off to visit mommy's family for the next week or so, I'm going to try to balance some efficiency with some relaxation. At least a little bit.