Same way every time
The four hundredth time is the first time.
How I use it
Once the local procedure is the one that keeps people safe, I run it the same way on the four hundredth repetition as on the first. I write what actually happened, not what was supposed to happen. I raise something out of tolerance instead of hoping it holds. Fresh eyes are for inventing the procedure. Discipline is for running it.
What I refuse
I know this one. We can skip the step. It will probably hold.