Full disclosure, we are former Hoboken residents and think it is quite possibly the best place in the world.
Whether you are there for an hour or a week, visit Carpe Diem. This is your neighborhood Irish Pub with the best wings in the world. Seriously, they have won awards.
There is a great waterfront walkway with stunning views of Manhattan and if you get thirsty along the way stop by Pier 13 which features a beer garden and local food trucks.
Washington Street is the heart of Hoboken and lined with boutiques, bars, and restaurants. It is also home to the original Cake Boss location, if you are into that sort of thing.