I know you are not supposed to have a lot of credit cards, but i am trying to build my credit?

I have different department store cards like, QVC, Shop NBC, Kohl's, and JC Penney. And i also got approved for the Capital One secured credit card. Did I go over board? I mean did I do the right thing. I barely use the JCP and the Shop NBC I have not gotten yet. I am paying over the minimum payment for the QVC and the Kohl's. (The two I use the most.) My balances on all of the cards I have are zero to low. Am I doing okay or is there something else I should do to improve my credit score.