Take out your driver's license and look at the expiration date. Put a reminder on your calendar to make sure you get it renewed before it expires.
If you live in the state of Colorado and you accidentally let your license expire you will be able to walk into a testing center and wait 2-3 hours to take the written test but you will have to schedule a road test a month in advance. That's right, the DMV system is so fucked up that there is a one month delay to take a road test. Or, you can pay an accredited driver's school to take the road test in a week, but be warned that if you don't pay to take one of their classes they will ding you on every little thing and check off things that you can't argue afterwards so that you will fail, and then they will encourage you to pay them to teach you how to drive. Especially if you are a woman.
My wife has been without a driver's license for over a month because of this bullshit.
Again, fuck you Colorado DMV. And fuck you DriveSafe Driving Schools.