This is for all the people who work most of the day on their computer. If you use your Desktop as a temporary dumping ground or for ideas or your current projects, consider screenshotting it from time to time. If it's in some other dedicated folder, screenshot that one.
The Desktop or the folder is a current snapshot of most things you're up to. Well, maybe your open tabs in your favorite browser could also be added. Anyways, doing this every few weeks will give you some excellent material to review at the end of the year. It is very low effort and doesn't even have to happen at some given interval. Whenever you feel like it - do it.
It's like taking pictures while being in Italy on vacation. At some point later in life you might take that album full of pictures and reminisce on it. I assure you, later you will definitely appreciate those screenshots. You will remember some parts of the year and possibly devulge in some nostalgia. You might laugh about the weird things you considered. Failed projects or maybe that one success - you will see its beginnings.
Makes you think though. Life has become insanely digital, at least for me.