From the SMART Recovery Tool Chest

SMART Recovery is an evidence-informed approach to addiction recovery.  Their tools are based on Rational Emotive Behaviour Therapy (REBT), which heavily influenced Cognitive Behavioural Therapy (CBT).  
The site includes Relapse Prevention-focused tools, as well as tools directed towards coping statements and disputations.
The link will take you to the SMART Recovery Tool Chest​ (opens in new window). 

'Brain Connections' Worksheets

Six excellent worksheets, developed by the Problem Gambling Institute of Ontario:

1. Go and Stop Networks Handout
2. Liking vs Wanting Handout
3. Urges Handout
4. Setpoints Handout
5. Substitution Handout
6. Take Home Messages Handout

Self-Help Workbook: "Changing Your Relationship with Gambling"

This excellent workbook is full of really useful information and worksheets.  It was developed by UK's GamCare service and can be downloaded here.  (Opens in a new window)

Interactive Conceptual Framework of Harmful Gambling

A suite of resources, developed by the Gambling Research Exchange Ontario.  Covers factors including: Biological, Social, Psychological and Cultural, as well as Gambling Types and Gambling Environment.  The resources are available here (Opens in new window)