[mercer]

The most specific, and yet still very general, advice I can give is meditation/mindfulness. it works even separated from more fundamental perspectives on life, but I'd argue it's especially valuable in that context.

EDIT: what I like about characters like Feynman and the stories they tell is that they seem to really confirm this approach to me. Feynman struck me as a person not too inhibited by introspection, but rather propelled by curiosity. If I meditate or let my mind rest and give up on the 'demands' of the world, I cannot help but feel that the resulting state is the kind that Feynman actively cultivated (without realizing it, perhaps). There's other stuff I feel like sharing, but honestly I believe that if you focus on this, and not just as a cool new idea but actual practice, it's likely to be worthwhile enough to make the rest inconsequential in comparison.