 This project also adopts a cluster-randomized controlled design to evaluate the effectiveness of a theory-based action planning toolkit . The toolkit will be distributed to the participants for their use at home, like a homework assignment, for the purpose of enhancing their intention and practices of the suggested behaviours. The development of the booklet was guided by the theory of The Health Action Process Approach HAPA, which suggests that ones intention can be foster by knowing that the new behaviour has positive outcomes as opposed to the negative outcomes that accompany the current behaviour; and planning action planning and coping planning serves as an operative mediator between intentions and behaviour Schwarzer, 2008. Previous evidence has shown the applicability of the HAPA in changing peoples health behaviours, e.g., physical exercise, breast self-examination, seat belt use, dietary behaviours, and dental flossing; and its generalizability has been confirmed by Schwarzer 2008. 