I am currently in UCI but i have some friends who went to UCLA.
The difference was just that i had 3.6 and he had about 3.9 gpa.
I also got 1950 on SAT and he got 2150. That is about it.
I would say you should try to become "captain" of badminton or different. like becoming a captain or making a club or something. I would stick to one event/sport/volunteer work because it shows dedication to your work and they like that.
good luck
sam