With a rule of no phones in the bedroom, reading a book at bed time becomes a habit. I read about a time in history which interests me, classic novels, some modern fiction. You would need to find your own niche. Don't read self help books, it's meant to be enjoyable!
I need to get back in the habit, but we have a sitting room with no television. I used to have a "no screens" (except e-ink ereaders with just books/PDFs/etc.) rule in there for myself, made for a great reading space. I broke it while working on a masters degree and needed a quiet space to study and work on projects, once I'm done with the degree I plan to go back to that rule though.
