I have a credit card sized piece of paper with my medical notes on one side and my contact details and my photo plus contact's contact details on the other. It's laminated to protect it and sits in my saddle bag - it's also very handy as a tyre boot if needed.
Ah, but won't that get missed in the hustle and bustle of an accident you ask?
I also have my name and home details with blood group and allergy on bright yellow Dymo tape on my helmet.
Me, a Tight Scot? Definitely