I agree that paying the bills on time is the most important aspect, but I don't think getting a card then ignoring it is a good idea. I did the same thing years ago with the Home Depot card (as well as Lowes and many other "store" cards). But with my Home Depot card, a few months after I used it to score the discount somebody stole the number from somewhere (certainly not from me, as I had also shredded the card after a single use). I happened to sign onto the card site to check something with my purchase and saw a ton of fairly large purchases that I hadn't made. I found it before they sent me the paper bill, although that would have notified me of the problem too. I was able to clear it up and get the card canceled, but it was a PITA. So now after I open a card, I check it monthly by just signing on, making sure the balance is still zero, then signing off. I do this every month for all of our cards until they drop a card for lack of use. It's not very time consuming, and saves me the annoyance of cleaning up after a theft situation.