How do I keep track properly of when tenants don't pay rent

[Jayden Hamilton]

How do I properly keep track of when tenants don't pay rent, and if this was to happen, what would be the first step I would need to take? How do I make sure I get paid back what I'm owed... what can I do if they don't pay. If I end up evicting them, how do I still get the money back they owe? or how can I apply for something that will go against their credit for not paying rent? I live in the state of Illinois.