Keep learning new thingsOur brain develops when we acquire new knowledge and skills in a variety of areas. To keep your brain from "drying out," take regular online courses and choose exciting but obscure topics.Changing habitual activities for new ones is useful for brain development, even if you don't get specific knowledge on the subject.
Go to an unfamiliar workout at the gym; switch from reading with your eyes to audiobooks; walk through the supermarket not the usual route, but the opposite one - "enriched", i. e. the most diverse environment is really crucial for the neuronal connections development