Credit cards can be your best friend or your worst enemy depending on how you use them. You might wonder why this is so. When they are used as intended, you can reap tons of benefits from credit cards and even improve your quality of life. Conversely, misusing them by overspending could mean the genesis of never-ending financial problems in the form of debt. It is worth noting that owning more credit cards than you need may also end in the same result. By managing your credit score and keeping it high, you can access lower interest rates on your credit card which is vital in keeping debts low.