Use an e-reader or smartphone
Several studies have suggested that using electronic devices like e-readers and smartphones, or even watching television in or before bedcan disrupt sleep. Robert Rosenberg, DO, author of Sleep Soundly Every Night, Feel Fantastic Every Day, recommends avoiding any light-emitting technology for at least one hour before bedtime.
"The blue light given off by computers, smartphones, tablets, and TV prevents the production of melatonin which helps the body become sleepy," he says. If you don't want to give up reading your Kindle Fire or using your iPad in bed, follow this advice from a 2013 Mayo Clinic study: Keep the device at least 14 inches from your face and turn down your screen's brightness to reduce your risk of light-related sleep problems.