Strong bodies are challenged in the gym, but built in the kitchen.
Although healthy eating definitely helps the mental athlete perform at their best, I have a different kind of nutrition in mind.
Outside of direct active study, I think that feeding your mind media related to what you are learning can do wonders for molding that sexy depth of understanding.
During the downtime of your day when you would either be listening to music, stuck in traffic, or walking around in the store shopping, have a playlist of media that you can pop on that is related to your studying.
Create a healthy diet of brain food to whip your mind into shape.