Participation in this study will last 24 months. Participants will be randomly assigned to one of three conditions: a six-session, cognitive-behavioral depression prevention group; a bibliotherapy group; and an assessment only group. Participants in the cognitive-behavioral group will meet with a study therapist and other group members to learn strategies for preventing depression. Participants in the bibliotherapy group will be given a self-help book titled "Feeling Good" with information on preventing depression. Participants in the assessment only group will receive a pamphlet on depression symptoms and treatment. All participants will complete assessments at baseline; after the cognitive-behavioral group has been completed; and at 6-, 12-, 18-, and 24-month follow-ups. These assessments will include an interview about depression symptoms and a survey about thoughts, feelings, actions, depression, and substance abuse.