Genes cannot be easily changed, which means they provide a powerful advantage in favorable circumstances and a serious disadvantages in unfavorable circumstances.

Knowing that someone else is watching  you can be a powerful motivator.

Just because you can measure something doesn't mean it's the most important thing.

What is immediately rewarded is repeated.

By utilizing commitment devices, strategic onetime decisions, and technology, you can create an environment of inevitability a space where good habits are not just an outcome you hope for but an outcome that is virtually guaranteed.

Author tells how Law of Least Effort effects person behaviors.