Acceptance and Commitment Therapy (ACT) gets it name from one of its core messages: accept what is out of your personal control, and commit to action that improves and enriches your life.
The aim of ACT is to maximize human potential for a rich, full and meaningful life. ACT (which is pronounced as the word ‘act’, not as the initials) does this by:
a) teaching you psychological skills to deal with your painful thoughts and feelings effectively – in such a way that they have much less impact and influence over you (these are known as mindfulness skills).
b) helping you to clarify what is truly important and meaningful to you – i.e your values – then use that knowledge to guide, inspire and motivate you to change your life for the better.
From Russ Harris at ACT Mindfully