Forget it if you carry a balance: Rewards cards usually charge higher rates.
Potential savings: Up to $200 a year
NEXT: Gas - Get rid of the guzzler
Last updated June 13 2008: 10:48 AM ET
Forget it if you carry a balance: Rewards cards usually charge higher rates.
Potential savings: Up to $200 a year
NEXT: Gas - Get rid of the guzzler