We explore behaviour change through various lenses. One study analyses how macroeconomic and microeconomic conditions differentially affect household grocery shopping behaviour, revealing nuanced responses to income changes and economic cycles. Another examines the relationship between attitude and behaviour change, proposing that the sequence depends on the level of uncertainty surrounding outcomes versus consequences. A third source details behavioural modification techniques, focusing on reinforcement and its application in psychology and education. Finally, a fourth study investigates gamification's impact on sustainable consumer behaviour, modelling the influence of reward-based game design elements on knowledge, attitudes, intentions, and ultimately, energy-saving actions.