Among things like this that I've learnt to do better after not even thinking there was a point for most of my existence, one that has been a (small) life-changer for me is shoe lacing. I've known how to do that well enough since childhood, yet there were much better ways I've discovered thanks to https://www.fieggen.com/shoelace/ .

It's shared several times a year on HN, but it really deserves it.