Angus Ridgeway of Potentialife, Hugo MacNeill of Goldman Sachs and Tim Arnold of Hailo at the ‘Be Your Best’ workshop in the ‘Irish Times’ offices. Photograph: Dara Mac Dónaill/The Irish Times

When he learned that there was no positive behavioural psychology programme that could be shown to actually work, Tal Ben-Shahar (44), an American-(...)