I would like to create a Magnetic/RFID card in a totally different shape than those flat wide pieces of plastic.
For example I would like to carry it as arm wrest, or a ring.
So you don't have to go out and grab my card all the time, and just can slide your arm on the reader.
I'm just not sure how to start.. Could I use some kind of chip and use it as memory for the information of the card.
Also I guess the Magnetic/RFID design could be smaller than it is, it doesn't need to be as wide.
All the RFID readers where I used to work were at waist level for me, so I just made an exterior pocket in my wallet for it. Didn't even have to take the wallet out of my pocket. There were many confused customers that attempted to use an RFID locked door right behind me though.
You could try embedding one of those tiny, glass encased RFID chips into a wristband or something.