The British Dora Horsfall completed 105 years on Monday, November 2, and attributed part of her longevity to a simple habit: to take a nap every day. Born in London in 1921, she kept the rest routine since childhood. The granddaughter, Mandy Cheeseman, believes that the custom can help explain the grandmother's disposition, described by her as a fun and contagious laugh. Do you wake up tired? Specialist gives tips to regulate your sleep schedule…