Unwanted negative, intrusive thoughts play an important role in the persistence and severity of anxiety and depression. They often take the form of obsessive thinking, worry, rumination or pathological guilt. This self-help book targets negative, intrusive thoughts, introducing therapeutic strategies based on new findings on the nature of mental control. David A. Clark is one of the most distinguished figures in the field of Cognitive Behavioural Therapy (CBT), and in Controlling Your Mind he offers a range of CBT techniques to help disrupt the persistence of damaging thoughts at their root, before they lead to anxiety and depression. Chapters focus on how to identify problematic intrusive thoughts, correct faulty appraisals of intrusion significance, refrain from ineffective mental control strategies, adopt more effective mental self-control, and boost the effects of positive mental intrusions.