We all learn a lot of things throughout the day and some of those things are more meaningful than others. Over on Hacker News, user jbranchaud started tracking what he learned over the course of a year. The idea here is pretty simple. At the end of the day, take five minutes or so and write down a quick note about one useful thing you learned that day. You can keep these short, it's not about critical thinking, it's just about noting something useful. You can find jbranchaud's "Today I Learned" entries over here on GitHub. As you'd expect, they're all tech-related to some degree, with fun stuff like hash Slicing in Rails or turning tabs into spaces in Vim. Yours can be whatever you want, tailored to whatever your hobby or profession is. You can also use whatever notes, journal or web app you want. Your personal "TIL" is simply a good way to reflect on your day, come up with ideas for a journal entry or even share some knowledge if you feel like making it public. Head over to the Hacker News thread for a lot of ideas on how you could structure your own.
Show HN: I've been writing daily TILs for a year [Hacker News]