You might not be using your credit cards optimally, and as a result, you might not be getting the most cash back for your buys. You also might be losing out on great rewards. But it's hard to keep track of which card is best for different situations if you have a couple to sort through. Redditor iambilliam has a clever way of keeping stock of what to swipe — taping reminders on cards that prompt consumers to remember which card is best used in different purchases.
Other redditors chimed in and suggested keeping lists in your wallet if you don't want to put unsightly tape on your cards.