More than a couple of decades ago, Marsha Linehan, Ph.D. developed a unique approach to the treatment of Borderline Personality Disorder (BPD) which she chose to call “Dialectical Behavior Therapy” or DBT. Research has established that DBT appears to help reduce some of the worst problems associated with BPD (such as repeated suicidal behaviors, therapy interfering behaviors, etc.).
If you want more information about DBT, consider starting with Wikipedia. In addition, Marsha Linehan, Ph.D. among others have since written a number of great books for professionals and laypersons alike which you can look up on Amazon. We included many elements of DBT in our book Borderline Personality Disorder For Dummies although we mostly tried to integrate the best techniques we could find from everywhere.