Help for the sleep deprived.  If counting sheep doesn't work for you, there are other successful strategies.
D001519:Behavior; D006801:Humans; D006993:Hypnotics and Sedatives / Q000627:therapeutic use; D007319:Sleep Initiation and Maintenance Disorders / Q000188:drug therapy / Q000517:prevention & control* / Q000628:therapy*
D006993:Hypnotics and Sedatives