The election is not until November 6th of this year, but you can get out to do some early voting now. There are many more early voting locations open now. If you have not registered to vote, you can do so at some of these locations as well. Currently there are 1.5 million people registered to vote in Cook County.
Check out the list of locations where you can get out to register and to early vote by county.
DuPage County Voter Information
McHenry County Voter Information
Lake County (Illinois) Voter Information