community service involves stuff like volunteering: e.g. Salvation army, vincent de paul stuff.
does the school you want have an entry test? if so, they would take that into accoutn as well. I think that you should ask a user called RivalryofTroll, he knows a lot about this kind of stuff.
Academically speaking you are very impressive, but do some extra stuff like chess/debating- it shows you are well-rounded and an attractive candidate. Hope that helps (:.