But if you don't have the money, you don't have the money. I guess you could still carry an "emergency" credit card; maybe one with a high interest rate to deter you from using it unless its really an emergency.
Of course, now you need a way to pay for tomorrow, but there's still options: skip a bill or two this month, borrow money (from friends, credit card, payday loan, sell your internal organs), work overtime, or whatever.