I have lifelock, but as MTH said, everything can be done by yourself.
You can take your name of the national solicitation list, and put a hold on your credit by a password. You can also request your own credit history.
The only thing extra lifelock has is, they will back up any loans/credit that is taken out fraudulently while you are a member of lifelock, up to 1,000,000.
The only thing they do not protect against is if your credit card number is stolen. They can prevent any additional cards from being open, but if your current card is stolen and used, thats up to you and the credit card holder to figure out.
For around a hundred bucks a year, its worth it to me.