Say the Financial Institution issued a card with a limit of $ 1,000. It simply does not mean that you have to use up the full $1,000 during the month. As per utilization viz-a-viz, credit score trends in the FICO system, a credit card limit utilization of under 30% is considered a score booster. This means that for a card limit of $1,000, you should not allow yourself to spend beyond $300 at any point in time. Checking your Credit Report regularly – It is prudent to check your credit report regularly. It contains your credit history, which is a record of your good, bad and ugly decisions about your personal finances.