Some people have credit cards because they rely on them, and others have them for sheer convenience. Newsweek lists out 10 things you might now know about credit cards. This one even I found a bit surprising:

One late payment can result in a significant drop in your credit score—of up to 100 points—so pay on time every time. A drop in your credit score of just 50 points can mean you pay $100 more a month in your mortgage payment.