Tempting as it might be to use your computer or phone before bed, research has shown these devices can interfere with sleep by suppressing the production of melatonin, a natural hormone released in the evening to help you feel tired and ready for sleep. Electronic devices may make you feel more alert and awake when you should be winding down instead. Can you make your bedroom a screen-free zone or turn the TV off 30 minutes earlier and read a chapter or two of a book instead?