Checking Your Social Security Report
In addition to protecting your credit report there are some other ways that identity thieves can use your identity. For instance if someone got a hold of your social security number, they could use it to get a job, etc. The social security administration sends out automatic statements each year. The statement includes a record of your yearly earnings, so you can quickly review this and make sure it checks out.
According to the website, this is supposed to be automatic, but I think I remember getting maybe one of these in my life. If this is the case with you, it would probably be good to request a statement. You can request a social security statement here. Maybe after you request one once, and they get the right address for you, you might start getting it more regularly.