Neurogenesis: How To Grow New Brain Cells

Exercise is the easy part, mating is quite a bit harder, requires a willing partner.
http://www.spring.org.uk/2015/02/neurogenesis-how-to-grow-new-brain-cells.php
Selected paragraphs:
Maya Opendak, who co-authored the study, said:

“New neurons may serve as a means to fine-tune the hippocampus to the predicted environment.
In particular, seeking out rewarding experiences or avoiding stressful experiences may help each individual optimize his or her own brain.”

Grow new brain cells

Rewarding experiences, like exercise and mating, have been shown to grow new brain cells in mice.