The SMARTER-life-GROWTH approach to wellbeing and happiness is a third wave integrative Cognitive Behavioral Therapy (i-CBT) approach. As such, the approach utilises a transdiagnostic, solution-focused understanding that can be applied across many coaching, positive and clinical situations to a range of problems. As no single modality covers the plethora of human experiences, the SMARTER-life-GROWTH approach integrates several well established psychological principles into a coherent framework (e.g. CAT, CBT, DBT, MANTRA, RO-DBT & Schema). By integrating several approaches into a coherent whole, a clinician can collaboratively create the best fit between the person and their difficulty from a range of options. Such integrative approaches are more flexible and personalised because they adapt to fit the person instead of trying to fit the person to the model. Preliminary findings and avenues for further research will be discussed within the framework of the MARIA (Mindful Awareness, Reflection, Insight and Action) acronym. Finally, the advantages of adopting both top-down (insight) and bottom-up (skills) based approaches to complex cases such as eating disorders will be discussed.