I know the feeling. Total random nature should prevail but it's the Murphy's Law at work here.
I have the Paterson negative file pages for 35mm which allows 7 strips of 6. When I KNOW there is a valuable shot, I will buffer it by cutting the strip before at 5 frames and have the good shot followed by a dud.
It's important because scissors are imprecise and can sometimes take a bit of image with them. Also gives a little fingerprint protection to the good shot.
At the end or if there is an empty frame, I will cut a generous clear space to grab onto.
I am not Obsessive Compulsive about it, but I have the option available to me when I think clearly.