Based on statistical studies, several factors have been shown to increase longevity :
* Sleep:Getting 7-8 hours of sleep a day. By giving parts of the body adequate rest, it helps regenerate and rejuvenate the cells to help it function better.
* Weight: The mortality rates in obese people are higher than those who are thinly built and who are in good shape.
* Exercise: This has been shown to not only increase the quality of life, but also prevent medical problems such as obesity, diabetes, and heart disease.
* Alcohol: Alcohol taxes the liver as well as the brain cells. Even though it has been shown that 1-2 glasses of red wine increases the good cholesterol, that is the HDL, and has been shown to reduce heart disease, there is no reason to start drinking if one is an abstainer. Increased or excessive amounts of alcohol is certainly detrimental to health.
* Breakfast: Breakfast is the most important meal of the day and this gives all the energy that is required for the start of the day. It is unclear how eating breakfast can make you live longer, but it supposedly does.
* Snacking: People who snack often end up gaining a lot of weight and fat, which can in turn lead to medical problems. One of the more popular snacks is potato chips, which also has a high salt content.
* Optimism: Optimists generally have been shown to lead less stressful lives and this may be the reason why they seem to live longer.
* Marriage in males: It is unclear how this increases life expectancy, but married men have been shown to live longer than their unmarried counterparts.
*Laughter:People who are jovial tend to be less affected by stress. Stress is one of the most under rated cause of medical problems and decreased longevity.
Of course, the above is based not on scientifically validated studies, but a combination of statistics, scientific research, and conjecture. However, some experts feel that the above mentioned factors increase life expectancy by seven years in males, and eleven years in females.