Developing a healthier set of coping skills for negative emotional states can be an incredibly helpful tool for clients. Here's a practical guide explaining healthier coping skills with interactive elements.
Body checking is a form of critical self-reflection which can drive low mood and coping mechanisms / abusive behaviours. This document covers body checking as well as provides practical exercise in overcoming body checking.
It's important to focus on the "why" driving a behaviour rather than ruminating on the outcome itself. Helping someone identify their "trigger(s)" can allow them to better realize an effective solution.