I didn't book, I went to the museum and they had tickets there..
I would say to break Manhattan up into sections and do 1 or 2 big events a day, thats what me and Nikki did..
I would defos check out Century 21 down the bottom end of the island, use the tube and get a 10$ card rather than taxi's.
Museum of sex is sh!t
Empire state is pretty pants too tbh..
Do rockerfellar in the evening for best views.
Take plenty of money.. We blitzed mega $ between us.. Went out for a meal, 2 8oz fillet steaks, shared chips, shared 8 king prawns to start, a cider and sam adams.. 158$ without tips..
Tips are: 10% for sh!t 15% for average 18% for good.. They normally print it on the bottom of receipt..
If you fancy the theatre I recommend Spiderman, its funny, entertaining and easy to follow...