I feel a lot less guilt when I use cash (I just feel the credit/check card drainage more) so I try to avoid using it whenever possible, it just vanishes into vending machines and stuff. I have a pretty even split between my using my bank card and my Visa. I carry a balance sometimes but it's never very high (I try to keep under $200 on my card at all times, and my interest rate is low) and I always make a valiant effort to pay it every month, I usually manage to do it.