https://www.science.org/content/blog-post/eureka
Off-topic framing but a very relatable feeling and process – how various chemists hit their “eureka” moments and discoveries.
Some people deliberately make time for activities that seem to lead to more chances for insight (long walks, showers, etc.) Others have been content to let these things hit them more randomly, although you do wonder of some of then have wondered about trying to recreate these experiences deliberately. One common experience is the feeling that some part of one’s brain has apparently been working on a problem outside conscious awareness and that it’s somehow reporting back with its results. But others describe what sounds very close to random chance – they just happened to read or see something that triggered the key insight.