Getting adequate sleep is another way to protect yourself from stress. When you wake up in the morning, you should feel fresh and sharp. According to the National Sleep Foundation, 63 percent of American adults do not get the recommended eight hours of sleep per night. Lack of sleep can lead to anxiety, depression, and academic problems. Researchers found that students who studied all week but then stayed up late partying on the weekends forgot as much as 30 percent of the material they had learned during the preceding week. Try the following suggestions to establish better sleep habits: