Building a good credit score takes time and responsible financial management. Here are some steps to help you build and maintain a strong credit score:

1. **Understand Your Credit Report:** Start by obtaining a free copy of your credit report from each of the three major credit bureaus (Equifax, Experian, and TransUnion). Review it for accuracy and report any errors.

2. **Pay Bills on Time:** Payment history is a significant factor in your credit score. Make sure to pay all your bills, including credit cards, loans, and utilities, on time.

3. **Reduce Credit Card Balances:** High credit card balances relative to your credit limit can negatively impact your score. Aim to keep your credit utilization below 30% on each credit card.

4. **Don't Close Old Accounts:** The length of your credit history matters. Keep your old credit card accounts open to demonstrate a longer credit history.

5. **Diversify Your Credit Mix:** Having a mix of different types of credit accounts, such as credit cards, loans, and retail accounts, can positively impact your score.

6. **Apply for Credit Sparingly:** Each credit inquiry (hard inquiry) can slightly reduce your score. Apply for new credit only when necessary and avoid opening multiple accounts in a short period.

7. **Use Secured Credit Cards:** If you're new to credit or rebuilding your score, consider a secured credit card. You'll need to make a security deposit, but it's a good way to establish or rebuild credit.

8. **Set Up Payment Reminders:** Missing payments can be detrimental. Use reminders or automatic payments to ensure you pay on time.

9. **Monitor Your Credit:** Regularly check your credit reports for errors and signs of identity theft. Many credit card companies offer free credit score monitoring.

10. **Be Patient:** Building good credit takes time. Avoid quick fixes or credit repair scams, as they can be harmful.

Remember that building a good credit score is a long-term endeavor. It's about demonstrating responsible financial habits over time.