Some tips I just heard on the Clark Howard show:
* Never let your checkbook leave your house! If your check book is stolen, good luck saving your identity!
* If you have all the credit you need, opt out of pre-approved credit offers, by calling 1-800-5OPT-OUT
* Check your credit reports for suspicious activity. Added bonus: You can make sure your credit report is ok (Some 8 in 10 credit reports have errors!)