If you intend to rely on public transportation to get around, ride the bus or train line near your prospective apartment before you rent. This may help you avoid unnecessarily long commutes, and will certainly make your decision process easier.
Chicago Subways & Buses
http://www.TransitChicago.com
Commuter Trains
http://metrarail.com/
Pace Bus Lines
http://www.pacebus.com/
