You want to use secure passwords, but you can't remember random numbers and letters. You'd also probably like a backup, in case your computer password system goes bad. PasswordCard provides the best of both worlds, offering strong passwords with a wallet-based backup.
The PasswordCard itself is printed in colour, has different symbols heading each column and a different colour for each row. You generate the card's random characters by typing a number into the field above the card and generating it anew. Store that number printout somewhere very safe — a fireproof safe in a deep closet, perhaps — and put the PasswordCard in your wallet. It might take some time to get used to "Note symbol, green" being how you remember where to find your iTunes password, or "Smiley face, purple" for Facebook, but it's a secure system, and even if your wallet is lost or stolen, it's useless to the thief without your number, or knowing your exact scheme.