The aims of the recent World Health Organization report, highlighting that every 40 seconds a person dies from suicide somewhere in the world, are to increase awareness on the public health significance of suicide and make suicide prevention a greater priority within the global public health agenda. Across age groups, less than half of individuals at elevated suicide risk interface with some form of mental health services. Several barriers to help-seeking have been identified (maladaptive coping, lack of perceived need, beliefs about treatment effectiveness, fear of hospitalization or mistrust of providers, stigma...), which are key targets in knowledge-based interventions on suicide. Psychoeducational programs have shown effectiveness in prevention relapse for several mental disorders such as schizophrenia, bipolar disorder or recurrent depressive disorder, improving treatment adherence and self-confidence in coping with symptoms of the disease. They are highly recommended for addressing adherence problems in patients with serious and persistent mental illness. Only one team has published a study protocol for a controlled trial assessing a 10 group sessions psychoeducational program for prevention in patients having a suicide history, in a one-year follow-up. Interestingly, diagnosis-mixed group psychoeducation have shown superiority than an unspecific intervention add-on routine care, on the suicide prevention and compliance for severe psychiatric disorders. Those psychoeducational-specific elements are namely the interactive transfer of illness and treatment-related knowledge and management/coping - cognitive/behavioral - strategies, as defined by the National Institute for Health and Care Excellence)-Guidelines (NICE). Notably, as several psychiatric diagnoses are associated with suicidal behavior (SB), coping strategies have to target processes that overlap among these psychiatric disease, as well as suicidal vulnerability. Acceptance and Commitment Therapy (ACT), a "third wave" behavioral therapy, targets experiential avoidance and psychological flexibility, at the core of psychiatric disorders. Interestingly, in patients with a history of suicidal depression, training in mindfulness can help to weaken suicidal thinking associated with depressive symptoms , and thus reduce an important vulnerability for relapse to suicidal depression. ACT would also increase intrinsic motivation for daily life action (i.e. reasons for living and acting). Then, the functional analysis (matrix) used in ACT seems to be an useful tool to help patient in decision making, a neuropsychological factor impaired in suicidal patients. Finally, acceptance and commitment group therapy has suggested effectiveness in reducing intensity and frequency of suicidal thoughts, through improvement in acceptance, in high risk suicidal patients. As compared with ACT, Dialectical behavior therapy (DBT) teaches added distress tolerance in view of survive the crisis. DBT is the most validated therapy for borderline personality disorder, the mental disorder the most associated with SB . Notably, group skills training is the most effective component in DBT for preventing suicidal behavior in borderline patients with high suicidal risk. Furthermore, interventions based on positive psychology have suggested efficacy in reducing depressive symptoms and suicidal ideation. Notably, in a recent pilot study, positive psychology exercises delivered to suicidal inpatients were feasible and associated with short-term gains improvement in optimism and hopelessness. Finally, as altered social link and sense of belonging have been widely involved in SB, relationship skills are an interesting positive psychology area for suicide prevention program.