I love credit cards so much. I never carry much cash around with me (unless I'm going to play live) and I use my card whenever I can. That said, I only have one card, my limit is only $1500, and I always pay off the entire balance of my card way in advance.

If you really don't think you have discipline, boost, you should just cut it up. If you think you can control the spending on it, keep it. But as soon as you buy something that is unnecessary on the card and you can't pay it off almost immediately, you should probably cut it up.