They used to be a deadbeat 30-something. Now they're a deadbeat 40-something. Time eventually solves all problems.

I can't speak for them, but my own case was similar. For me it was a long process of making the bad habits harder and good habits easier. I deleted my League of Legends account (this improved my life by far the most of these changes) and blocked a bunch of sites on my browser. I started taking more walks, began getting up at a set time which I gradually shifted earlier and earlier, and started working more.

It sounds cliche, but it has worked exactly that way for me. A little more good habits, a little less bad habits, repeat x1000 and you're a whole new person in a whole new place.

For me: getting better at delayed gratification by exploiting habit-forming.

I stay mindful of what it is I want, and am certain I want, and create reminders for myself to prevent my auto-pilot from going off track.