Everyone wants the secret to living longer.
But, guess what? There isn’t just one way to prevent aging.
Here are some tips that may help keep you young.
1. Always wear sunscreen.
Applying it daily will reduce the sun’s harmful effects on your skin – and make you appear younger.
Use a product that has UVA and UVB protection. This will ensure you are blocking out both the cancer-causing and aging rays.
2. Try to eat a Mediterranean diet. 
Consuming vegetables, olive oil, fish and wine – in moderation – has been shown to slow an aging mind.
This type of nutrition is also linked to a lower risk of heart disease, diabetes and certain cancers.
3. Exercise in order to stay sharp.
Doing crossword puzzles, reading and catching up with friends will work your brain muscles. Don’t forget to incorporate some physical activity into your day as well.
4. Reduce stress.
Deep breathing exercises, such as yoga, or even a change of pace, can help.
Keeping your anxiety at bay will ward off signs of aging. If you are stressed, you will look and feel much older.
source : http://www.foxnews.com/health/2012/07/25/4-ways-to-keep-yourself-young/