After my usual workout, I thought about neuroplasticity, which is "a process involving adaptive structural and functional changes in the brain" (NIH definition). It allows us to think flexibly and creatively and increases when we take a break from focused work or business. So, take a rest, go for a walk, exercise, or relax in a hot sauna. Free your mind from burdens and obsessions.
I had many brainstorming in my swimming, resting in a hot sauna, taking a walk, or even in my sleeping bed. Let your mind go its course by not pressuring it too much. I don't mean that neuroplasticity improves only through exercise or rest. It can be strengthened through meditation, good sleep, learning a new language, playing an instrument, and making art.