Either way, you should always remove any errors or outdated information from your credit report — regardless of the actual effect on your score — as soon as you discover them. A clean credit report can give you peace of mind the next time you apply for a loan; you’ll know that an inaccurate credit score isn’t holding you back from qualifying for a better interest rate, saving you time and money in the long run.
You'll probably have a limited amount of money to put toward credit repair each month. So, you'll have to prioritize where you spend your money. Focus first on accounts that are in danger of becoming past due. Get as many of these accounts current as possible, preferably all of them. Then, work on bringing down your credit card balances. Third are those accounts that have already been charged-off or sent to a collection agency.