It's important to note that repairing bad credit is a bit like losing weight: It takes time and there is no quick way to fix a credit score. In fact, out of all of the ways to improve a credit score, quick-fix efforts are the most likely to backfire, so beware of any advice that claims to improve your credit score fast. The best advice for rebuilding credit is to manage it responsibly over time. If you haven't done that, then you need to repair your credit history before you see credit score improvement. The following tips will help you with that. They are divided into categories based on the data used to calculate your credit score.