I had someone use my paypal account within days of the Sony breach. Best thing you can do is just monitor your bank accounts and credit card charges. When that happened I set up mobile alerts, they text you when there's activity on your account. (You can choose which activity is important enough to send an alert for.)
If your credit card information was stolen, you might want to request a new card from your bank. You are usually given one free new card per year, and this doesn't happen that often anyway.