Most of the above is great advice. One thing I really enjoyed was a bike tour. "Bikes, Bites and Brews",
http://www.bobbysbikehike.com/Tours.aspx was awesome. Got to try some deep dish pizza, a hot dog, and see the harbour and some very awesome parks, and even some residential areas. Was perhaps not as breathtaking as the river architectural tour, I had more fun on the bike tour.