Wallets get lost. Wallets get stolen. Cards get forgotten, or eaten by the ATM. And then.... you have to remember which card(s), the number and "Was it a Visa or Mastercard?" so you can call to report it. Not such a fun task. Which brings me to something that was told to me: make a copy of your the cards in your wallet, front and back. And if you can, write the customer service number next to it to make it even a smoother process.
