I am rebuilding my credit and trying to improve my credit score. I have an SUV that I bought outright and only have credit cards ( A bank Visa, Mastercard, a couple of retail credit cards, gas card. I have no installment loans and I rent a home. I just added a Home Depot card to the mix and of course my credit score dropped. I use Wamu and they give you ways to rebuild your credit and analyze your score every month. This month it told me for the first time one of the reasons my score is the way it is is because I have no installment loans and I should have a good mix.. My credit score is still just below 680 which is required to get a decent loan interest rate so I don’t want to really go into more debt until my big ugly repo from 2001 falls off next year which I”m sure will raise it considerably..( I made some mistakes when I was young) Can someone give me some advice?