Gratitude Letter

Description: Write and then deliver a letter of gratitude in person to someone who has been especially kind to you, but has never been properly thanked.

Duration: 20 minutes

Frequency: Once

Benefits: immediate increase in happiness and decrease in depressive symptoms; effect lasts approximately one month.

Reference: Seligman, M. E. P., Steen, T. A., Park, N., & Peterson, C. (2005). Positive psychology progress: Empirical validation of interventions. American Psychologist, 60(5), 410–421. https://doi.org/10.1037/0003-066X.60.5.410