What are some of the most awesome psychological facts?

What are some of the most awesome psychological facts?

1. Fear can feel good—if we're not really in danger.

1. If we have a plan B, our plan A is less likely to work.

1. We care more about a single person than about massive tragedies.

1. Beginnings and ends are easier to remember than middles.

1. It takes five positive things to outweigh a single negative thing.