What is CBT?
Cognitive Behavioral Therapy (CBT) is a type of therapy that centres upon addressing specific problems and teaches strategies for managing those problems.
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The Beginnings of CBT
The theory behind cognitive behavioral therapy is that actions are a product of feelings, which are shaped by thoughts and beliefs.
It was first researched in the 1960’s by Dr. Aaron Beck at The University of Pennsylvania.
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CBT Today
Modern CBT methods are both problem–centered and action–based. This means that they are used to address specific problems and teach clients strategies for managing those problems.
These sessions can be performed in a variety of settings, from one-on-one meetings to group sessions with other people.
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CBT helps clients achieve the following steps:
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Recognise troubling or upsetting life circumstances
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Confront negative or inaccurate thoughts and replace negative behaviours with new, positive habits
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Generate awareness of personal thoughts and opinions about those circumstances
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Detect, isolate or filter thoughts that are negative or inaccurate
Because CBT is a goal-based therapy, it is common for therapists to give assignments to be completed between sessions. These assignments may include reading or completing specific tasks. 
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Therapists often adapt sessions to the individual rather than establishing a one fits all syllabus for treatment. This may mean that a client initially meets with a therapist multiple times per week, gradually tapering off to once a week, once a month, or once every few months as recovery progresses.
The skills participants acquire in CBT-based therapies and approaches remain long after the treatment is completed, and CBT is most effective when used as part of a more comprehensive treatment and rehabilitation program.
References: http://www.delrayrecoverycenter.com/12491/guide-cognitive-behavioral-therapy/
