#11: Always Be Prepared
When you’re in school, you learn a lot of history, writing, and math. However, they seem to neglect more practical things like how to pay taxes and change a tire, so there’s no shame in not knowing to buy a plunger BEFORE you actually need one. When was the last time a plunger crossed your mind?

provided by constative.com
This Reddit answer falls somewhere between an unwritten rule and a simple life hack, and you’ll probably remember it from now on. If you’re already covered in the plunger department, this is a pearl of wisdom that should be passed down to all of your future generations. Be kind, remind.