Ask HN: What did you learn in 2025?

What is something you learned (or had to re-learn) in 2025? New skills, insights, life lessons that could be worth sharing with the rest of the forum.

For me: I've been forced to relearn how important sleep hygiene is and that it is something that can fall away slowly resulting in misery. Maintaining a consistent be time is a chore but one that does make for a happier life.

17 points | by kiernanmcgowan 1 day ago

3 comments

  • jamesbaxter101 3 hours ago
    importance of always validating ideas in business before created a full fledged tool - saves time, money, and you get an idea of the market you are penetrating
  • austin-cheney 1 day ago
    I learned to write my own WebSocket library more than 2 years ago. Last year I learned to write a web server that did HTTP and streamed redirection from the same ports as WebSockets. This past year I learned to do everything else, like all the OS related things, in my personal app:

    https://github.com/prettydiff/aphorio?tab=readme-ov-file

  • chistev 20 hours ago
    The importance of working out and how it affects your mind positively.