The three credit reporting agencies are Experian, Equifax, and Transunion.
All three offer a credit monitoring service which will alert you immediately to any changes such as the opening of a new account in your name. Everyone should subscribe to such a service.
Everyone is entitled to one free copy per year of your credit report from each agency. Spread them out. January it's Experian, May it's Equifax, September it's Transunion, something like that.
If your state allows it, put holds on your credit report. This means that nobody can get access to it without your permisssion. This means that you can't walk into a car dealership and drive out in a car financed in your name. It delays credit applications because you have to approve the request to review your credit report. It also is a great way to stop fraud. If your state doesn't allow it, take the time right now to write to your state legislators and demand this.
It really a shame that you have to pay to have your car alarm monitored so that if your car is stolen you'll be notifed and it can be tracked, you have to pay an alarm company to monitor your house so that if it's broken into police will be called and you'll be notiifed, and you have to pay to have your identity monitored too. This is the cost of crime and it affects all of us.