Always turn in your equipment

 One thing my job has taught me. Always take the cable equipment back to the store when you're done with the service. Don't trust the apartment manager with anything. They will not return the equipment, they'll let someone else use it, and leave you with the bill. 

I can only hope I remember when it's time.

Also, never trust the post office to forward your mail. If you owe someone, make sure it's completely paid, and you notify them of the address change. You can get put in collections and not be notified, if they keep sending everything to your old address.