"Bright-eyed, optimistic children were more likely to be highly social, and "went to more parties where they smoke and drank, craving the buzz," [...] "They died from accidents." Or they remained happy when things were going their way, then crashed when confronted with the difficulties of life.Other findings? Nose-to-the-grindstone types who don't cut corners outlive the slapdash, happy-go-lucky folks; and people who have a high-stress, rewarding job tend to outlive those with duller, less stressful employment. --Oh, and don't retire, either, if you want to live a long, long time.
...Like all such studies, it's only "true" for some majority of a large group; your personal mileage is liable to vary. Me, I'm gonna keep on smiling even if fortune favors the sourpuss -- 'cos what's the point in hangin' around only to be miserable?