Mood repair strategies offer techniques that an individual can use to shift their mood from general sadness or clinical depression to a state of greater contentment or happiness. A mood repair strategy is a cognitive, behavioral, and interpersonal psychological tool used to affect the mood regulation of an individual. Various mood repair strategies are most commonly used in cognitive therapy. Homework may be assigned by a therapist. However, these tools can also be used for individuals experiencing temporary unwanted moods. Many factors go into the effectiveness of mood repair strategies on an individual ranging from the client's self-esteem to their experience with the strategy being used. Even the way the mood repair strategy is presented may have an effect on that strategy's ability to improve mood.