Personal information – Make sure the names and addresses reported match your personal history. As noted above, sometimes the reports of people with the same or similar names get combined incorrectly; having your report tied to that of someone with bad credit can lower your score. To correct an error you need to document, in writing, what is wrong. This can be a quick fix if all the negative information belongs to someone other than you, but proving that may take some time.
The best way to improve your score is to have good behavior reported every single month. For example, you can take out a secured credit card and use it monthly. Charge no more than 10% of the available credit limit, and pay the balance in full and on time every month. Your credit score will improve as your negative information ages and your credit report fills with positive information.
Another avenue to pursue to improve your credit score as quickly as possible is to negotiate with your creditor and credit bureaus to see if they are will to make adjustments. This can be especially effective if you have established a current strong payment record. In that case, a creditor can often be persuaded to remove previously reported late payments as a “goodwill” gesture based on your current payment history, and to encourage you to maintain the course.
The best way is to be sure you are paying all your bills on time. And, if you have credit cards, try to keep your balance to less than 30% of your credit limit (less than 10% is even better). We suggest checking your credit score monthly (you can get two scores every 30 days from Credit.com), along with personalized advice for improving your credit. Here’s how to monitor your credit score for free.
I do not agree with the secured card info you've provided. They are great tools when used correctly. You can find one with no/small annual fee. The interest rate won't come into play if you pay your balance in full each month. Even if you don't pay in full, the interest on a very low balance is a non-factor. Alomst any credit union will allow you to open an account with as little as $5 and secured card with $300/500. My card is $500 and I never charge more than $150(30%). It takes will power to not max it out. You don;t want to fall back into old habits (if that is what got you into this situation in the first place).
With poor credit, you may not be able to get approved for new credit products like credit cards. Although you may still be able to take out an auto loan or a mortgage, you’ll pay a much higher interest rate because of your low credit score. Compared to a borrower with good credit, someone with poor credit can pay $50,000 more in interest on a mortgage. Over an entire lifetime, you could end up paying over $200,000 more in unnecessary interest just because of bad credit.