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8. Sleep with your phone in bed

Some people are so attached to their cell phones that they sleep with them on their nightstand or even under their pillow. Cell phones pump out electromagnetic radiation whenever they're on - which means sleeping with one nearby boosts your exposure all night long. What can you do? Put the phone on "airplane mode" (which shuts down the transceiver) or turn it off. If you need to be available for calls, place the phone several feet away from your bed.