Food Ithaca Farmer's Market - Saturday is the big day for this one in the summer, though also open Sundays and Thursdays. Lots of fresh, local produce.
Wegman's - The "destination resort supermarket". They have everything, if you can only find it. In-store prepared foods are quite good for an easy take-out meal.
Brownie's Corn - finest corn stand in the area, and quite close by (
map).
Crafts Ithaca Farmer's Market - Lots of local arts & crafts, as well as the produce above. General "Pyramid" Mall Waterloo Outlets