Collections
Does anyone else collect things in adulthood that were scarce when you were a child?
I wish I could communicate to my younger self and say "Listen kid: One day you'll have tons of Allen wrenches, cable adapters, ball point pens with matching caps, and inflating needles to inflate your soccer ball. Ease up on the anxiety because one day you'll weirdly cling to these things...
Oh...also, invest in something called bitcoin when you first hear about it. Then just.... sit on it for a while."