This question might have been asked before. I am new to this game, and my first major credit application was through Citi and I've had their Dividend card for about 5 years. 3-4 credit cards later (mostly for the bonuses ) I'm 23, and have a credit score in the high 700's. I want to apply for the AA Citi Visa, but I don't like having too many useless cards lying around and want to get rid of the Dividend card. I've heard that canceling your oldest credit line can hurt your score in the short term, but if I apply for the AA card first, then cancel the Dividend, it'll be like the credit line with Citi was never severed right? Help a newbie!