Change it when life changes.

The principle

Events, not intervals.

Calendar maintenance fails because nothing on the calendar feels urgent. Event-driven maintenance works because the event is already happening.

The list is short and mostly obvious once written down: you changed something important, someone left your circle, or something was exposed.

Re-writing a card takes a couple of minutes. The hard part is only remembering that now is one of the times.

Triggers

Go to the drawer when:

1. I

   The email moves

   You changed the address or password everything recovers through.

2. II

   The number changes

   New phone account, new country, new SIM.

3. III

   Someone leaves

   A relationship, a housemate, a business partner.

4. IV

   A leak lands

   You were told a service was breached and you changed something.

5. V

   A card goes missing

   Change the password, re-write the set you still have.