If you’ve decided to get a new credit card, or are thinking about canceling one of your existing cards and need to decide which one, it’s important to make an informed decision. Credit card issuers tend to handle fees and interest in different ways, and sometimes an issuer will even use different rules for the different cards in its lineup. Before you make a decision about any credit card, pull out a copy of its disclosures, get out your magnifying glass, and look for the following danger zones.