Don't use your mobile phone too much.

I highly recommend you set aside 20 minutes to listen to Dr. Blank's speech in the video above. Dr. Blank speaks with deep experience and commanding authority on the impact on cells and DNA from electromagnetic fields, and explains why your DNA is especially vulnerable to electromagnetic fields compared to other tissues.

Commonwealth Club 11-18-10. Panel II – Martin Blank, PhD from ElectromagneticHealth.Org on Vimeo.

Dr. Martin Blank of Columbia University explains how the electromagnetic fields that emanate from your cell phone and other wireless devices affect your cells. 
Nikola Tesla once said: "If you wish to understand the secrets of the Universe, think of energy, frequency, and vibration."