Maybe make the move in your head, close your eyes and take a breath, exhale, then look at the board every move? That seems like just a 3-5 second pause and could bring you right back to the moment so you can make your final check.

Its just an off-the-cuff idea. I think it needs to be something you do every move so you don't need to "trigger" a new behavior...when would you start it? Before you realized you were going to make a mistake...that would mean there's no problem