Sleep and meditation are the ultimate performance enhancers. Arianna introduces this lesson's special guest teacher, NBA superstar Kobe Bryant. What do Arianna Huffington and Kobe Bryant have in common? They are both meditators, and they both value the power of sleep. Kobe had to learn the hard way that getting more sleep meant better performance in all areas of his life. So he went from getting three to four hours of sleep a night and struggling both physically and mentally, to recognizing firsthand the difference enough sleep makes in our lives and changing his behavior to reap the benefits. He describes his sleep regimen and daily meditation practice, and how these two habits can really improve our performance in life.