How do I find my old or recent posts?

Well, here’s the question I’m posing in the title:
I occasionally jump into a discussion thread, but once I step away, I find myself completely unable to track down the whole conversation again. It’s a bit like losing a set of car keys in a cluttered garage—you know they were there a moment ago, but suddenly the trail goes cold. 😵
Best, 🎉

Make sure you subscribe to the threads you're active in. The search function has been broken for ages now, and frankly, nobody has any clue when they'll actually get it fixed.

Thanks!