Firstly, I always use Madison Avenue. It's my favorite street in New York and I could just window shop up and down for hours. I usually take Madison all the way up to where I need to be, but after hitting Ladurée (since I'll never skip Ladurée) I headed over towards Central Park. And boy am I glad I did.
If you ever get the chance to just spend an afternoon in Central Park wandering around on the various paths and trails I cannot recommend it enough.
There are some more photos of the absolutely beautiful park under the cut.