If you want to live a longer, healthier life – make two friends and call them frequently! Researchers at Brigham Young University analyzed 150 studies and found that people with a strong social support network – meaning, they had a circle of close friends –saw measurable decreases in blood pressure, plus improved immunity… Which decreased their chances of dying from any cause by a whopping 50%. And the researchers say that’s just as big a boost in survival as quitting a pack-a-day cigarette habit.