There's a natural instinct embedded in friendship, a sympathy that makes us willing to fight for someone we like when they are treated unjustly.

The problem is that your brain can't tell the difference between bad and good habits, and so if you have a bad one, it's always lurking there, waiting for the right cues and rewards.

Between calculated risk and reckless decision-making lies the dividing line between profit and loss.

Change might not be fast and it isn't always easy. But with time and effort, almost any habit can be reshaped.

When people have a willpower failure, it's because they haven't anticipated a situation that's going to come along.

This is the real power of habit: the insight that your habits are what you choose them to be.

Habits, scientists say, emerge because the brain is constantly looking for ways to save effort.