Zappo's will give you, on anything ordered today, not their usual 1-year return policy, but you can return until the next Feb. 29 (4 years from now).
Chicago's Navy Pier offers free parking today, and free rides on the giant Ferris Wheel (although with today's expected weather, I wonder if it will even be running).
Chicago's Children's Museum is offering 29 cent admission to kids under 15.