I used to store: - Casual thoughts and ideas to review and ponder about them later. In case I didn't have a smartphone or notebook near me, I could put them in

I used to store: - Casual thoughts and ideas to review and ponder about them later. In case I didn't have a smartphone or notebook near me, I could put them into a palace, into the so-called "random room"(a place that you should review periodically to sort the remaining things out, i.e. categorize, put images into other places). However, it's simpler to spend time looking for a notebook to write the ideas down. - Phone numbers. In cases such as losing my phone, to call my relatives, friends. - Information about people I met. Sometimes there were a lot of people I met in a day/week at university. I wanted to remember their names, some general info. The problem with names is they may repeat. One may use an image of a known person with this name and add a few more images to describe the person better. E.g. a place where you've met, hair color, a hobby, other peculiarities. - First medical aid. - Books' summaries. Rather fun to store than useful in real-world situations: - Bus numbers and their schedule. Also, a schedule for a local airport and railway station. E.g. where this man with luggage is going to? It's winter, yet he wears a Panama hat. Let me check the possible routes...It was fun to guess. p.s. I didn't haunt people. - Birthday dates. - Other random information, e.g. historical dates.