This is my favourite bit of information ever.
I've always tried to take the hard path, and just get stuff done that i don't want to do. As a kid, i would say to myself, just do x or y, its only 30 seconds and then you can chill. This would be something simple like, take the stairs instead of the elevator , or wash the pots and pans before eating, etc, that sort of thing. Nothing like Goggins, but it still allowed me to create discipline. Looking at me now, this discipline that is instilled within me, from a child, which is obviously now related to the anterior midcingulate cortex, has made me into such a good hard working adult who doesn't mind taking the hard road for anything, because i know the benefits that come from doing things you don't want to do, eg, keeping the home clean, exercising regularly, working hard, eating healthy. Its great to be able to attribute this towards a physical change in the brain, rather than just put it down to will power.