This study aimed to develop and validate a brief emotion regulation training program that improved mental well-being. The program was preventative in nature, designed to build resilience while fostering more satisfying personal and professional relationships in a community sample. It was developed and piloted with 10 graduate students during Study 1; for Study 2, a community sample of 75 adults were randomly allocated to either a treatment (n = 38) or control (n = 37) group. In the pilot program, the social validity of the program was confirmed, while study 2 demonstrated significant changes in positive coping techniques (i.e., reappraisal) at one-year follow-up in the treatment group when compared with the control. These findings may have broad implications in the health sector due to the brevity, scalability, and cost-effectiveness of this newly designed intervention.