Key Takeaways Payment history is the most important factor in your credit score, so set up auto-pay to ensure you make on-time payments. Aim to keep your credit utilization ratio at 10% or lower—requesting a credit limit increase can help. Avoid canceling unused credit cards. This will help you maintain a higher total credit limit and a lower utilization ratio. Whether you want to apply for a mortgage or get a new credit card this spring, improving your credit score can help you save money. Borr ...