Smart money 101: 10 costly mistakes that keep you from getting rich

Using your credit card for luxuries feels effortless until the bill lands. The high interest rates, often between 18% and 40%, can quickly pile up. If not paid on time, debt can spiral out of control. Spend smartly and keep your card use for essentials, not impulses.

Rule: Only buy what you can pay off in full each month. Credit should build your score, not destroy your finances.