If you want to do it by yourself I would first put an ad in the building you live in, let the doorman know that you'll be renting your condo and then post on Craigslist.
If you're super busy with work/life/etc and just don't want to worry about renting it yourself, that's where I can come in to help out. What I do is advertise on the MLS which has exposure to every Chicagoland Realtor. By listing with me your condo also, by default, gets advertised on every website such as Trulia, Zillow, Realtor.com, Google, Yahoo and I post my own ads on Craigslist. I'm here to help you every step of the way from listing your home to coordinating showings, processing rental applications, coordinating lease paperwork and even building paperwork to get the tenants ready for move in time.
I'm very realistic in knowing that you may want to rent your condo yourself so no hard feelings - I just wanted to be sure you knew of how much I can take off of your shoulders if you choose to work with a Realtor!
Best of luck.
3101 N. Greenview Avenue | Chicago, IL 60657
309-269-3499 CELL | 773-305-0480 FAX