Ask HN: What systems have you devised for your life?

There are many a blog posts and quite a few books extolling the virtues of systems over goals. I believe in the idea, but it is difficult to understand where to start.

I am curious to know about real world experiences of setting up such systems.

Have you set up such systems in your life?

What goal did you transform into a system?

How did you go about designing the system ?

How successful was that? How are you improving on it? If you have to do it all over again, would you go about it the same way?