I cannot stress enough the importance of staying out of trouble as a credit-rebuilding tool. Even doing nothing can help a bad credit report, but repeating poor credit habits can make things much worse. Creditors can be somewhat understanding of a bad credit incident, if corrected. This can be particularly true when the bad credit originated with problems outside of the debtors control such as emergency medical bills. Repeated bad credit behavior indicates a problem with deeper roots and looks to be a stronger indication that future credit worthiness looks shaky. If you want your credit to improve, be perfect with your new credit, as well as old credit where accounts remain open.