If you want to improve your memory, then keep learning and doing new things. The substantia nigra/ventral tegmental, which is responsible for regulating dopamine- a neurotransmitter that aids memory formation in the brain, is activated by novelty. Revising, or overcoming memory problems, could therefore be more effective if new facts are continually added to the list rather than repeatedly going over the same information.
Additional Links between diet, health and dementia. Including the good news that curries could prevent Alzheimers.