What do you think of when I say the term “mnemonic device”?
An example of mnemonic device is the notebooks I used so far to save memories from losing. What it takes to write? Just a pen and a few pages. I even did write memories on tissues, and when I reported them on my notebook it felt like losing an important part of the memory itself. Everything can trigger memory, even flowers or sidewalks, beyond feelings and headaches. But nothing can actually be a living memory other than your own handwriting.