I watched a very interesting series of lectures by fiction writer Neil Gaiman, even though I have no intention of being a writer.
He talked about the pitfalls of writing and pointed out that if you, as the writer, found yourself stymied by something you wrote that kept you from proceeding further, you should go back and find out where you went wrong and work forward from there.
It turns out this works well for artwork as well.
This is a painting called "Phyllis Park". I had basically found myself painted into a corner, so I went back to where I thought it went wrong and started from there.
I'm glad I did. And grateful for Mister Gaiman's sound advice.