Creative imagination — like composing music or making discoveries — can be improved with two steps: exposure and experience.
A strong fantastical imagination — or getting completely absorbed in an idea — can be improved by engaging in pretend play — or acting.
Episodic imagination is like fantastical, but it uses real memories instead of fantasies.
You can practice this by imagining the process, not the outcome, of a desired future event.
Whether you get mesmerized...