I keep 3 credit cards. Discover is my emergency card, with a limit of 2500. Walmart and Target are my "Christmas" cards, with only 200 limit each. Should I be applying for more credit cards? I don't really WANT more, but will it boost my score? I know a lot fo people have like 9 different cards, but I have 7 student loan accounts and a mortgage...do I really need to get more credit cards?