This document provides guidance on estimating life expectancy based on factors like gender, education level, location, family health history, lifestyle habits, stress management, pet ownership, medical checkups, outlook, and social relationships. It indicates adding or subtracting years based on these factors, with the highest additions being 5 years for vigorous physical activity 3+ times a week and the highest subtractions being 8 years for smoking 2+ packs per day. Regular checkups, an optimistic outlook, and close relationships are emphasized as ways to potentially add years to one's life expectancy.