Here’s an easy way to rev up your brain health. Drink coconut water. It’s high in potassium, a mineral that’s important to brain function. People who don’t have enough potassium tend to have a slower rate of brain activity. Bananas (medium-sized) have more potassium than coconut water—but also more calories. To benefit, all you need is about one cup of coconut water daily. You also can add it to smoothies and mix it with milk.

Research proves that people learn better after napping. Strategic napping—taking a nap for no longer than 40 minutes and before 5 pm (so it doesn’t interfere with nighttime sleep) is the key, write Michael J. Gelb and Kelly Howell in Brain Power (New World Library). When you can, find your spot and take a nap!