I use a mind-map to organize my ideas.
My identifying the specific audience is ... students. After the schoolmates look, I hope that they can know what occurrence of the sport day and they will have the interest to join the next year sport day.
更新1:
我既topic係:sport day in the university, 因為我覺得與中學既sport day,有點相似! 而且可以令人回憶返中學既時期,與証明自己既能力!