Recently I've found it a bit annoying not having a credit card of my own available. Most online shops take debit cards so that's fine, but a few things like Steam and Xbox live need a credit card. I'm a student living off my loan so having a credit card for regular use wouldn't be a good idea. But I'd like to have one for the odd purchase that required one. I don't really know much about credit cards so are there any disadvantages to having one for occasional use? How do you pay it back? Is there a way it can be paid back automatically from my bank account? Knowing me I'd forget to do it if I had to send something off or the like. Is there anything else I need to know about them?