If you're chasing some inspiration for your trip, swing by September 11 Tribute Center. You may be able to pick up some informative brochures or pamphlets.
You'll have sightseeing choices galore when visiting Manhattan. September 11 Tribute Center is a good place to start here, but there are plenty of other worthwhile sights to appreciate. Times Square, Statue of Liberty, and Broadway are close to the tourist information center and will round out your day nicely.