I swiped this from Real Age.
"1. Take Your Vitamins
Regularly taking vitamin C (1200 mg/day), vitamin E (400 IU/day), calcium (1000-1200 mg/day), vitamin D (400-600 IU/day), folate (400 mcg/day), and vitamin B6 (6 mg/day) can make your RealAge 6 years younger.
2. Quit Smoking and Avoid Passive Smoke
Smoking makes your RealAge 8 years older.
3. Know Your Blood Pressure
A person with low blood pressure (~115/75 mm Hg) is as much as 25 years younger than a person with high blood pressure (greater than 160/90 mm Hg).
4. Reduce Stress
In highly stressful times, your RealAge can be as much as 32 years older than your calendar age. By building strong social networks and adopting stress-reduction strategies, you can erase 30 of those 32 years of aging caused by stress.
5. Floss Your Teeth
Flossing and brushing daily can make your RealAge 4 years younger.
6. Be Active
Even a small amount of exercise—two 20-minute walks per day—can make your RealAge nearly 5 years younger.
7. Wear Your Seatbelt
Regularly wearing a seat belt and driving within 5 miles per hour of the speed limit can make your RealAge as much as 3.4 years younger.
8. Fill Up on Fiber (there's that word again)
Getting 25 grams of fiber per day in your diet can make your RealAge 2.5 years younger than if you only included 12 grams of fiber per day in your diet. Men may need even more than 25 grams of fiber per day.
9. Monitor Your Health
People who are proactive about seeking high-quality medical care and managing chronic conditions can have a RealAge as much as 12 years younger than their peers who do not.
10. Take the RealAge Test; Develop an Age Reduction Plan®
Over your lifetime, you can make your RealAge as much as 26 years younger. That means that you will live younger every day, and live longer with as much health and energy as possible.
11. Laugh a Lot
Laughter reduces stress, strengthens the immune system, and can make your RealAge as much as 8 years younger.
12. Become a Lifelong Learner
People who remain intellectually involved throughout their lives have a RealAge as much as 2.5 years younger.