Remove tech from your bedrooms. Wired = Tired. The lure of phones, TVs and computers in our rooms is just too much to resist, especially for children. An hour spent watching TV in bed is an hour less sleep, and the stimulation to our brains caused by technology prevents us from 'switching off'. Using an actual alarm clock will help remove the temptation to look at your phone as soon as you wake up too.
Factoring in screen breaks involving the whole family will reduce the possibility of anyone feeling picked on or singled out.