You have a low score, so I’m going to guess you have some charged-off, unpaid or seriously delinquent accounts on your credit report. The damage to your credit score has already happened. What you can do initially is make sure the negatives reported on your credit file are accurate and not out of date. Look over your credit reports, and dispute any negative items that you don’t think are yours or are more than 7 years old. Once you have ensured your history is accurate, you can work on adding new, positive data.
The best way to handle these types of information lines on your credit report is to dispute them but you have to remember that if that isn't done correctly, it is like kicking a hornets nest. Just calling them and saying, "hey, I dispute this." is NOT good enough, regardless of what ANYONE says. It has to be done with a certified, return receipt letter that has been properly worded to prevent the sleezy little buggers from using a loophole. You can find a lot of information out there about how to do this on sites from people like Dave Ramsey or with self help books like Weathering Debt (either one works, but I prefer Weathering Debt, it was much more concise and to the point) but whatever you do, DON'T try to wing it and don't pay someone to do something you can do yourself with ease and for free. Besides, you need to know how to stop the problem from happening again, right?
We’ll explain each of the four pillars of credit repair in detail below. Just remember, each step on its own will not be enough to completely fix your credit. Credit repair, after all, is like peeling an onion: You have to peel away a few layers before you get to the good stuff. But we’ll try our best to make sure your credit recovery doesn’t bring you to tears.
Each time you apply for credit is listed on your credit report as a “hard inquiry” and if you have too many within two years, your credit score will suffer. In general, a consumer with good credit can apply for credit a few times each year before it begins to affect their credit score. If you’re already starting with below-average credit, however, these inquiries may have more of an impact on your score and delay your ultimate goal of watching your credit score climb.