1. Recognize that clinical depression is a disease. Internalizing this fact will help your child in two ways. One, it will hopefully keep you from blaming yourself or your child. This is no one's fault. Second, if you think of depression as a disease instead of a choice your child is making, you won't say anything stupid like, "Why don't you just pull yourself together," or "Stop feeling sorry for yourself."

2. Don't freak out. This will definitely not help your child. Clinical depression can...