

You have a good point! It does sound like my suggestions only help for repeated behaviors. For example, Tiny Habits seems to indicate that it’ll work for habits but not for novel situations.
You explicitly mention that it’s unlikely that research covers situations that are entirely novel and rare. Do you know about schema theory or relational frame theory? I ask because both of those theories explicitly deal with how entirely new information (such as entirely new situations) is processed in the human brain and how, depending on the schemas or relational frames that a person already had, the person will react in different ways.
But we don’t have to go into the theoretical weeds. The popular books that I mentioned earlier deal with novelty. For example, Lakoff shows how, inside the head of any person, a small set of beliefs can end up guiding most of the person’s moral thinking and therefore their choices. Not only that, but even the book titled Tiny Habits has sections dedicated to one-off behaviors. Heck, the book Drive deals with teams that are at the bleeding edge of knowledge and techniques, technologies and workflows that no human has ever dealt with before, and yet the book is able to show how there is a set of evidence-based principles that consistently motivate (or not) those very teams.
The fundamental issue is whether humans are able to recognize a situation and know what to do about it. Our brains have been endowed with the capacity to derive thoughts, to think up entirely new situations, to imagine scenarios. We can use that to increase the odds of responding effectively to situations we have never been in before.
Some people understand the history and the opportunities of living in a country without tying their identity to the country. They can contribute to it, accept diversity, and yet have a more trascendental sense of self. They understand the state can be helpful for certain goals, and not for others.
It’s like money. If we all agree that a piece of paper and some metal is valuable, then it is. We don’t have to worship it. We can use it when it’s helpful and not when it’s not.
Turns out, the more educated, wealthy, and connected a whole population is, the more they are able to go from conceptual senses of self like “I am French” to a more trascendental sense of self like “I am a living being like so many others, and I happen to live in France”. This can also be achieved with certain wisdom traditions, like with loving-kindness meditation. More broadly, it can also be achieved with reflection.