For example, I am already in the habit of logging every phone call to any doctor's offices or important contacts as they're happening. Being able to refer back to all the notes has helped me manage a number of complex errors. I know the name of the person I spoke to, the date, and what we discussed. Any time I need to make a call about a topic or to a company, I have an easy way to pull up all the past notes.
I'd like to think if I ever got amnesia, already having this system in place would serve me really well if I couldn't learn new things. I have the old things, and the habit of referring to and adding new things to the list.
But I wonder what else would or wouldn't be useful to try to practice now?