Once you've paid down the balance of your credit cards, keep your spending on these accounts down. You should aim for a balance that is less than 30% of your credit limit on the card. Don't voluntarily lower credit limits; this can hurt rather than help your FICO® Score. If your credit report doesn't reflect your actual credit limit, make sure your credit card company updates this information with the credit bureaus. In addition to limiting your spending on the accounts you already have, be cautious when any new accounts and don't cancel any old accounts since these help your credit score by demonstrating a longer credit history.
Each time you apply for credit is listed on your credit report as a “hard inquiry” and if you have too many within two years, your credit score will suffer. In general, a consumer with good credit can apply for credit a few times each year before it begins to affect their credit score. If you’re already starting with below-average credit, however, these inquiries may have more of an impact on your score and delay your ultimate goal of watching your credit score climb.