Teach you to measure changes in your symptoms, prepare for obstacles and set goals. Help identify triggers and patterns to your low moods, and to understand that you can play an active part in getting yourself out of a low mood. What is Depression? About 12% of the population experience depression severe enough to require treatment at sometime or other in their life. People experience depression in many different ways, but perhaps the most prominent feature is a low or sad mood. Other typical signs of depression include: lethargy, trouble with sleeping or early waking, feelings con...