"Make sure your kids eat well, exercise, and get enough sleep.

"This recipe seems like a no-brainer, but most teenagers are not taking care of themselves in these simple ways. Damour calls sleep the “silver bullet.” Adolescents are supposed to get nine hours of sleep a night. “Any amount under that,” she says, “and they’re going be more stressed, more reactive, and sadder.” Indeed, a new study shows that teenagers who lack adequate sleep are at greater risk of depression and suicide. The study found that “each hour of sleep lost was associated with a 38 percent increase in feelings of sadness and hopelessness among teens."