Interest on credit cards? No way! Here's what you do:
Read that "junk mail" that credit card companies send you. They are always touting
NO INTEREST UNTIL NEXT YEAR if you pay off your balance.
So pay off your balance by putting THAT balance on ANOTHER credit card with low or no interest.
Just keep revolving them and you'll NEVER pay interest again!
NOTE: Just don't go crazy with it! You don't want such a high balance that you won't be able to use the next card you just paid off an old balance with!