Next, list your outstanding balances in order of highest to lowest interest rates. Focus first on the high-interest balance -- paying it off even a few months earlier can save you $100 or more in interest charges. However, if two rates are close but you owe a lot less on one card than another, you might target that lower balance first for the satisfaction of getting rid of one monthly bill. “Seeing that disappear can give you more motivation to keep going,” says Frank Boucher, a Reston, Va.-based financial adviser. Then, use the money you used to put toward that bill to pay off another balance even faster.