This one's a no-brainer to any of who have had to be spunky and agreeable after too many nights staring at the ceiling. A 2002 National Sleep Foundation poll connects mood with sleep habits. Among those with sleep problems, 21 percent said they were dissatisfied with life, and 12 percent described themselves as angry. Nearly half had trouble getting along with relatives or friends, and more than 60 percent felt impatient waiting in lines or stuck in traffic. Dissatisfaction and anger were three times lower for those who said they get enough sleep. And they were more likely to describe themselves as "full of energy," "relaxed," and "happy." says Joyce Walsleben, PhD, "sleep and mood are regulated by the same brain chemicals."