Hack 6. WE ONLY USE 10% OF OUR BRAINS WERE NOT TRUE.

"Where does this rather popular belief come from?
It's hard to find out how the myth started. Some people say that something like it was said byEinstein, but there isn't any proof. The idea that we have lots of spare capacity is certainly true and fits with our aspirational culture, as well as with the Freudian notion that the mind is mostly unconscious. Indeed, the myth was being used to peddle self-help literature as early as 1929.3"
"The human brain is a very expensive organ, requiring approximately 20% of blood flow from the heart and a similar amount of available oxygen, despite accounting for only 2% of body weight."