What could you learn in the next 15 minutes and could use your rest of your life?

I have often asked this question for myself.

Would it be important to dress properly or how to choose your suit, shirt, pants or the right glasses?

Maybe it's important to know what Google knows about you or how many ways you can reduce stress ...

Others may consider techniques to learn how to better understand people around you or how to make your own vegetable garden or how to avoid crusting pizza dough.

What do you think?