In today’s fast paced world, having enough sleep is a luxury for many of the people out there. Also, with high levels of stress, one cannot have a sound sleep even when one has the time to sleep. Leonardo da Vinci has some methods of sleeping enough for people who crave a sound sleep. The method is based on years of experimentation and practising and the methods work effectively. Since everyone’s body is different, several kinds of polyphasic sleep might not work for everyone. Read the methods for sleeping enough in just four hours. Do you think this post might be helpful for others, then do pass it to others.