Pay no interest, if you can help it. Each month you need to payoff your reward credit cards. Only exceptions is your emergency credit card.

Always setup a payment schedule to payoff your emergency credit card. Try to have your emergency credit card paid off in less than a year.

When paying your other credit cards remember. The interest each month is higher than your rewards you will receive.

Payoff your rewards credit cards. Also pay your bills on time. If you don't pay your bills on time you will lose your rewards and your interest rate will increase. None of which is good. Again payoff your rewards credit cards every month and on time.