A helpful rule to hang up and define a space as low-powered, wanting to avoid backlit screens. Give it a try, it has helped me focus my space and avoid my dumb addiction of watching random vids at night in bed till I fall asleep. (Post)
It’s a single-page PDF with the sign, 6” x 6”. That’s about it. If it helps, any donations appreciated, but feel free to just give it a go.