Tweetit shouldnt....your not going to want to cancel all of them...and you want to carry a balance here or there...after all, no credit out there, what can they score you on? how many cards do you have that your going to pay off? how many do you have that are staying open? how many open auto loans? any other, like boats, atv's or other installment type of loans....the only thing i'd watch out for is driving yourself to shallow wiht no open trade lines