Sleeping well is not only related to the number of hours we rest but also to the quality of the sleep we get. Nowadays it is very common for us to get used to sleeping badly, a situation that is not at all advisable. The unfavorable consequences of poor sleep include alterations in mood, deterioration of interpersonal relationships and work performance, and increased risk of accidents. On the other hand, sleeping well helps you live better, increases vitality and productivity, strengthens the health of your heart and immune system, improves your mood and lengthens your life. This book, intended for all those who recognize that they have difficulty sleeping and resting, has been carefully prepared by professionals in the field of Sleep Medicine, and summarizes the main sleep disorders, as well as how they are diagnosed and treated. In it, the reader will obtain general information to become aware of the importance of not underestimating these disorders and, thus, receive professional help in a timely manner. The book also includes a care guide for the prevention and correction of some sleep disorders in the different stages of life.