From: How to Slow Down Your Body's Aging

1. Change your perception of time. Don't be in a hurry.
2. Get restful sleep.
3. Eat fresh, nutritious food.
4. Take at least two multivitamins with minerals every day.
5. Practice a mind body technique such as yoga or tai chi.
6. Exercise regularly.
7. Don't put toxins in your life, including toxic food, toxic
emotions, toxic relationships, and avoid toxic environments or toxic relationships.
8. Have a flexible attitude to minor hassles.
9. Look at so-called problems as opportunities.
10. Nurture loving relationships.
11. Always have an attitude of curiosity, learning, and wonder and spend time with children.

From: http://health.yahoo.com/experts/intentblog/1647/how-to-slow-down-your-bodys-aging