Debit cards are a great convenience. If you're not using one already, give it a try. You can save time by paying for gas in your auto at the pump, and by using it in automated self-serve check-out lines. The one down-side is you need to keep track of the receipts to keep your finances in order. Make sure you have a designated In-Box for financial papers that you can easily dump your debit slips into upon returning home.