do you routinely overdraw your bank account? if not, you probably a) keep more than enough in checking to cover a typical month's expenses, or b) carefully track your balance to ensure each purchase won't take you past zero. unless having a credit card in your hand gives you an uncontrollable urge to spend more money than you have, I don't really see how this is any less trouble than a debit card. if you're not living paycheck to paycheck, just put the card on autopay and keep 2X your monthly expenses in checking. if you don't have a lot of surplus income, you need to be careful, but it's no different with debit.