CREDIT CARD = NOOOOOOOOO!
i was 20 before i finally gave in to just a small card while i was at uni. its nice as when you get a bit stuck, you use it, but then the circle begins.
now i am careful with my money, part of my job is finance and administrations management but those B&^*$%^£ managed to really guff me up by throwing credit cards at me right at the times when i was worst off, i.e. middle of the month, not to mention the offers off "transfere your other debts to your card" and x% back per purchase yada yada.
The entire system is designed to keep people on lower to middle incomes hooked on that card, have you never asked yourself why only people whose incomes are above a certain upper bracket are eligible for the lower interest rated cards (i.e. 9 to 12% apr) whilst those on low incomes can only get the 15.9 to 25% apr cards...
Take my advise, avoid it like the plague, stick to a debit card, if you want more money get a small low interest loan and pay it back monthly. do not under any circumstances get a credit card, no matter how enticing the initial offer may be.