Review your bank and credit card statements each month - each week if you use online banking - for unusual or unauthorized transactions.
Order a copy of your credit report at least once a year. You are eligible for a free credit report each year from the three major credit bureaus, which you can order by visiting www.annualcreditreport.com.
(Super Tip: If you space these out by ordering one from each bureau at a time, you can get one every 4 months).
If going on vacation, call the U.S. Postal Service at (800) 275-8777 to have them hold your mail at the post office until your return.