One of the main ways of controlling the emotional roller coaster is the brain / heart connection. If you can bring you heart rate back down, your body will react to the situation of stress differently, allowing you to think about the best decision instead of just reacting. This is achieved primarily by the two things closest to your heart.
These two simple things will allow you to calm right down and become centred, allowing time to think of Jesus and his power in the situation. Participants in the Emotional Rollercoaster workshop were instructed to practice this in times of calm, so they will be ready at a moment of stress to use it.