“There are four things that we know improve brain health and brain function,” says Shubin Stein. “Meditation, exercise, sleep, and nutrition.” Determined to use every tool at his disposal, he exercised strenuously, which also helped him to sleep better. He ate more fish, vegetables, and fruit. He renounced his “worst tendencies,” including a habit of handling stress by gorging on vanilla ice cream with mashed-up chocolate chip cookies. And he developed a regular meditation practice—a mission-critical habit for many successful investors. These “practices for sustained high performance” have “a
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