Your bedtime is a boundary. Anyone who needs you at 3 a.m. better be on fire or family.
STILLNESS
STILLNESS
Sleep is the base everything else in your day sits on, and it gets treated as the most negotiable thing you own. Late availability is easy to give away because the cost lands tomorrow rather than tonight. A genuine emergency will still reach you, and almost nothing else qualifies.
Set the phone to let through the few people who would really need you and silence the rest. Choose the hour and keep it on ordinary nights, since that is where the difference gets made. Nobody who matters will mind hearing back from you in the morning.
Who still texts you long after you wanted to sleep?
Free, with nothing to buy inside it.