Here are two pretty great books that help regular people use Cognitive Behavioral techniques on their own. The Happiness Trap by Russ Harris gets into a newer offshoot of CBT, called Acceptance and Commitment Therapy (ACT). The other book is old-school, but still very helpful. Feeling Good by David Burns has helped me tremendously with my own automatic thoughts. Buy either of these using these links and show your support for The Teen Mind.