In rebuilding my credit score, is it true that I need to open as many credit cards as possible?

No. In fact, opening too many credit card accounts can be very harmful to your credit repair process. The reason is that potential creditors look at the ratio of credit used to available credit to determine your creditworthiness. Specifically, if your account balances rise to the level of 30% or above of your available credit, creditors presume you are living beyond your means and, therefore, present a credit risk. The credit repair attorneys at Garg & Associates have found that it is important to keep your account balances low if you want to increase your credit score. Moreover, it is better to establish other credit accounts to show creditworthiness like a mortgage or a line of credit. As with any other type of credit account, it is crucial that you make payments on time and even double up on the payments periodically, if possible.