How many times in my life have a sewn a binding on a quilt? I would say somewhere between one and two hundred.
How many times in my life have a sewn I binding on the WRONG side of a quilt? Once. Today.
Fortunately, I discovered what I had done when I stopped to turn the first corner (of a LONG side, of course). I said to myself, "Self, this does not look right". I won't print what I said next.
The moral of the story: Stop when you're tired.