You just paid your Nordstrom card down to zero and vowed to never use it again. Yay! But don’t close the account; you’ll reduce the total credit you have available and jack up your balance-to-limit ratio. Plus, the longer you have a card, the better it looks, so it's a good thing to let it hang around on your credit report. Keep the account active by making a small purchase every few months and immediately paying the balance.