Best way to plan my NYC trip?

So my mom and I are going to new York for her 50th bday. We are each planning one day to things that we would like. For my day I chose shopping. I definitely want to go to 5th avenue and Madison avenue and also china town for my day. I would also like to go to soho. Are any of these places even close? What would be the best way to go about this? Are there any other good shopping places I have missed? We are staying at the marriot in times square if that helps with planning the itinerary at all. Also, if you have anymore advice I would appreciate it! Thanks!