This presentation will provide an overview of Cognitive Behavioral Therapy for Insomnia (CBT-I), the first-line, evidence-based treatment for chronic insomnia. Participants will review the empirical support for CBT-I, learn the core components of treatment, and gain practical guidance on assessment and implementation in clinical practice. The webinar will also examine the role of CBT-I in patients with co-occurring psychiatric conditions, with a particular focus on substance use disorders, highlighting its potential to improve sleep, support recovery, and reduce reliance on sleep medications.