36. make your phone a wallet

albert on 't Is Goud posted about an idea he had to slim-down his wallet: taking photographs of his id cards, and storing them as photos in an album on his phone instead of carrying them around all the time.

this probably won't work for you to swipe the card you need at the atm, but i bet it works for many other purposes like for insurance cards. i'm not sure what the doctor's office will do when they want to take a photocopy of the card...maybe i'll email the photo to them.