I could reel off a list which would include all the usual stuff you might expect to see and do in New York as could most people if they have been there.
My suggestion is to buy the Rough Guide to New York - I think its about a tenner from Ottakers - this covers eveything then you can plan from that. You have plenty of time from now until October.
Make sure you get to one of those typical New York Diners either for breakfast or lunch but not both on the same day!- I think there is quite a famous one which is highlighted in that book I have suggested.
Byee
Lisa