Often our moods can change so quickly and automatically that we are unaware of what actually caused them. Keeping track of your moods in a mood log can help you reflect on the factors and situations that affect your emotions.
Discovering the thoughts and situations that are linked to low moods can help you anticipate what factors (such as certain people, times of day, thoughts) are most challenging for you. With the information learned from tracking your mood you can gain insight into your habitual reactions to triggering events and work with bringing awareness to your responses so that they are not as automatic.