2. Keep your card’s outstanding balance at $0, as much as you can
When you use your credit card, you know that your credit card company gives you a few days of interest-free grace. If you pay off your balances during this period, you won’t be paying any interest charges, while also having the ability to rotate your cash for a few days.
However, this will only happen if you pay off your balances. Let the outstanding balance accrue for just one month and you will quickly start to rack up high interest charges.