Adding fees, boosting rates. so you might want to shut down a few cards. it makes sense, oh, maybe shut down the one that has nothing on, but you want to go about it more strategically. first think about another important part of your credit score is how long you have a credit account open. it's called your length of credit history. >> that's very important. >> yes. your track record. how long you've been keeping debt and holding it, making it hopefully a good record of paying down debt. so when you're thinking about which cards to close down, want to keep the ones that are open, the one you h...