I turn my phone completely off at night. There's maybe a little bit of anxiety (what if there's an emergency and someone tries to call?) But then of course, they can't call because my phone is off and whatever the crisis is it will still be there in the morning.

When I wake up and have that urge to check my phone "real quick" to answer some insane question in the middle of the night, I remember that I have to wait while the thing boots up first, so I grumble, roll over, and go back to sleep.