It's... really not that hard. All you have to do is be content with what you have, and not go lusting after new opportunities. Although granted, anyone who can pull that off probably isn't going to be a multibillionaire CEO, because that's the kind of personality selected against among CEOs.

But if you're married, with kids, and you're willing to throw that away to chase someone else, I'd argue you have a serious personality flaw going on there.