What made a family emergency plan easy enough to remember? / 什么让家庭应急计划真正容易记住？

Was it a short contact card, one out-of-area contact, two meeting places, a practice routine, or another simple rule? Share only non-sensitive patterns. 是简短联系卡、一个外地联系人、两个会合点、定期演练，还是其他简单规则？请只分享不敏感的方法。