Watch NewsNation's "The Future is Now: A Cuomo Town Hall" at this link. (NewsNation) — Wealthy biohacker Bryan Johnson, who's spending a fortune in hopes of significantly prolonging his lifespan, offers three simple tips that he uses to optimize his sleep. The so-called longevity guru said he considers his resting heart rate before bed the most important biomarker that can help him achieve his long-term goal of living well past 100 years. Advertisement Advertisement'The Future is Now: A Cuomo Town Hall' asks: What does AI mean for the human race? Longevity guru Bryan Johnson: AI will empower people to face 'health needs'Johnson, who made his fortune through digital payment companies, has become known for trying to reduce his biological age through strict diet, physical training and medical tracking.