Good topic Tweva!
Routine really can kill you. That is why I often saying that you need to expect unexpected. However impossible sounds it can be done easy actually, just do not take always things like they look, and calculate all options.
There are many examples, in medical (EMS) field if you find man who smell on alcohol and who is unconscious most probably that he is very drunk, but you still need to check him, maybe he had only one drink and then someone attack him and knock him down.
Do not put “all stakes” in one option, always leave all possibilities open, it is very important in world when SHTF because people will act based on need of their survival, and everything else is less important to them, including you.