Electronics and Melatonin levels

From the GOOP newsletter link I posted earlier, but something I'm being more conscious of:

Have an “electronic sundown.” At around 10 pm, turn off your computer, charge your cell in the other room and turn off the TV. Scan your bedroom for blinking or glowing lights – the alarm clock, the charging indicator on your cell phone, the DVD clock and timer, etc. Turn these off or cover the lights. Each little bit of light can stop your melatonin levels from rising, which you need to induce sleep and to reach the deep restorative sleep your body requires. If you can’t darken your room, wear a sleep mask. This period of darkness will help reset your natural rhythm.