The 12-day window to register to vote or change your registration is about to slam shut. If you're already registered to vote, no worries. But if you're not, and you want to vote in the aldermanic run-off on April 5th, you need to register by Tuesday.
You can mail in a form (just make sure it's postmarked by 3/8), you can go to any Secretary of State's Office where drivers licenses are issued, or you can go to the Board of Elections downtown. Click on the button on the right sidebar for details.