Growing up means some rules start making sense and some stop making sense. Both are worth noticing.

Rules you grew up with were written for a particular person in a particular situation, and you have changed in both respects. Some turn out to have had good reasons you could not see at ten. Others were about managing a child, and keeping them now would mean staying one.

Take two rules you still follow without thinking and ask what each is for. Keep the ones whose reason still applies. Let the rest go deliberately rather than by rebellion, which usually just swaps one unexamined rule for another.