As long as you pay off your credit card each month, cards with no annual fee essentially let you earn free rewards.

Now, there actually isn't a Capital One Trifecta. You're probably thinking of the Chase Trifecta, which is a strategy for earning more rewards points by using three Chase credit cards. However, Capital One cardholders can employ a strategy called the Capital One Duo.

Chasing credit card rewards while carrying card debt makes no sense when you consider the exceptionally high interest rates cards charge when consumers carry a balance. The best way to get ahead with credit card rewards is to always pay your statement balance in full each month.

Determining the best all-around cash-back credit card can lead to plenty of arguments. Everyone believes they know the best cash-back card today and can come at you with a list of evidence as to why they think so.