Oh, New York: it makes no difference that you've seen the latest show at the Met, stumbled on a street theatre in Washington Square, watched an open-air fashion show behind the Public Library, gazed at amateur roller-blade artists in Central Park, discovered the best Mexican restaurant in the Village, bought an old jazz record from a street store and a half-price theatre ticket on Times Square - you'll still go to sleep worried that you've missed something. But if its any help, New Yorkers feel the same way.