Life is often busy, demanding and full of challenges that can cause us to lose sight of what really matters. The Acceptance and Commitment Therapy (ACT) Diary 2021 is designed to help individuals focus on the things that are most important to them. It puts values centre-stage where they can best guide actions and decisions, and is especially helpful for those engaged in Acceptance and Commitment Therapy (ACT); however, the principles are relevant to anyone seeking to build psychological flexibility - the ability to connect fully with experiences, including difficult thoughts and feelings, and pursue an authentic life. Weekly short, accessible pieces discuss aspects of psychological flexibility, present helpful metaphors and suggest exercises to identify core values, clarify issues and record goals; while reflection spaces offer regular opportunities to record thoughts, identify barriers and track progress.