Well, it's a long story, but I tend to have a goal for every one of my projects; even if that goal is to provide a reusable library for other projects.

The vast majority of my projects are reusable libraries and SDKs (Swift Packages, for the most part).

I do every one of my projects as if I were delivering to a Fortune 50 corporation.

I write a bit about how I do stuff, here: https://littlegreenviper.com/miscellany/thats-not-what-ships...