it is not post mortems we need it is ''pre mortems''

You are anticipating a heavy day, you know it is going to be stressful
what is required here is an awareness that stress heightens cortisol production
and indeed leads to cloudy  thinking in many cases.

So rather than reflecting the day after your evaluations of your success or failure on that stressful day
far better to have put the same level of energy into your pre mortem as you do in your post mortem
(a futile task as you cannot change anything.