Richard Junker presented on improving longevity and mortality trends at the Waterloo Optimists meeting. He discussed how life expectancy has continuously improved over time in the US due to decreasing mortality rates. The top causes of death are heart disease, cancer, and lower respiratory disease, with smoking being responsible for nearly 1 in 5 deaths. To improve individual mortality profiles, Junker recommended adopting a healthy diet, exercising 30 minutes per day, and maintaining a normal body weight as lifestyle behaviors like obesity now pose a major health risk akin to smoking.