Great list. I go a little further on notifications: Do Not Disturb (DnD) mode 24 hours a day, 7 days a week, which inhibits all calls, texts, messages, E-mails, and most importantly notifications. This allows you to use the phone on your own terms and schedule, not on someone else's, including app developers desperate to prod you into their apps. A big part of the smartphone problem, in my view, is how we have all become slaves to them--using them when they demand to be used, rather than when we choose to use them.
If it's important, they'll leave a message or E-mail, which you can check on your own schedule.
Hopefully your father / brother / SO / whoever doesn't need urgent help from you, ever.
I used to always power off my phone at night, until one day at 2am I was in the middle of nowhere needing help from a friend, and he did actually answer the phone. He told me: "if it was the other way around, you wouldn't have helped me". For me it was a life saver, and I could totally see how harder would everything have been if he did like me every night (no one else to call at that moment, before that's asked).
Since then, my phone is kept on and unsilenced at night. If anyone important to me needs my help, I want to be there for them. Not that it's happened ever once in the last 10 years, though :)
> If it's important, they'll leave a message or E-mail, which you can check on your own schedule.
Depends on your use-case. I use my phone to support my hobby, the Mode-s receiver in my attic sends an e-mail when an interesting aircraft arrives at the local airport.
So for me it's a notification tool that requires timely attention.
On the other hand it's not a toy, I don't have any games installed.
I guess it might be a great tactic depending on your culture. I tried going with 24/7 silent mode, and then with no phone at all, but had to give in after being repeatedly badgered first by my coworkers, and then by my boss. They expect everyone to be available all the time, in every single company I know of (from friends/acquaintances). I still ignore most emails and phone calls outside of working hours though.
If it's important, they'll leave a message or E-mail, which you can check on your own schedule.