A good credit rating requires you to have and use revolving accounts, take out installment loans and pay all of those obligations on time, according to MSN Money website writer Liz Pulliam Weston. Your credit file looks bad when you run up too many debts, or miss payments, but there are several easy ways to repair your standing. Catch Up Past-Due Accounts Your credit records are hurt every month that you're delinquent on any accounts. The My FICO credit score education website explains that late payments affect 35 percent of your overall...