Do you have appropriate clothes and shoes? You will be walking
a lot; good footware (not just "cool") can make the difference
in a good trip and a nightmare. Business dress clothing will be required when attending the United Nations. ( See
Delegate Information)
Go!
Don't forget:
Camera
Spending Money (even though food and lodging are provided in
the cost of the trip, there are always incidental expenses and
the "absolutely essential" souviners.
Any required Medication.
Pack light - dirty clothes
take up more space than clean ones and you will be bringing back
more than you take.