I'm struggling to respond constructively to your comment. Think about all the phenomena that make up "cognitive ability" and all of the possible dimensions and properties of "cognitive decline".

It should be obvious that your advice is not in any way useful or actionable. And rituals are a very well accepted strategy for dealing with situations which demand consistent and good attention, where human cognitive variability causes problems.

A couple of famous examples--checklists used by aircraft pilots, or the pointing rituals used on Japanese railways.

Safety rituals are extremely useful exactly because accidents happen when you have reduced capacity without realising it.

Doesn’t matter if it’s because of lack of sleep, work stress, cognitive decline, etc.