Then be conscientious:
Conscientious people live longer, according to a study by University of California, Riverside researchers that appears in the latest issue of Health Psychology (vol. 27, 2008), the journal of the American Psychological Association.
Howard S. Friedman, distinguished professor of psychology, and graduate student Margaret L. Kern analyzed data from 20 studies that focused on conscientiousness-related traits and longevity, and involved more than 8,900 participants from the United States, Canada, Germany, Norway, Japan and Sweden.
“The major finding is that this conscientiousness aspect of personality is indeed reliably predictive of mortality risk across studies,” Friedman said. “This seems to be as important as most commonly assessed medical risk factors, few of which are psychological.”