By focusing on one pattern—what is known as a “keystone habit”—Lisa had taught herself how to reprogram the other routines in her life, as well.
One paper published by a Duke University researcher in 2006 found that more than 40 percent of the actions people performed each day weren’t actual decisions, but habits.prl.3
Habits can be changed, if we understand how they work.
Habits, scientists say, emerge because the brain is constantly looking for ways to save effort.