I've spent more weekends than not in New York this summer, but it was my first time in Ithaca. I jumped off a waterfall and drank kava tea and ate four bagels in three days and, most importantly, drank in a river.
Lastly, some places to go:
Collegetown Bagels
Purity Ice Cream
Sacred Root Kava Lounge
Angry Mom Records
Waffle Frolic