What I have settled on for personal growth fits in a few lines. Keep changing. The goal is to be a different and better person than I was ten years ago, not to defend that older version.
Start from one fact: neither the universe nor anyone in it owes me anything. That turns every good thing into something to notice, not something to expect. Good things do tend to happen to lucky people. But luck is partly built. I can put myself in the places, rooms, and habits where luck is more likely to find me.
Value the small things, without becoming obsessed with them, and never take them for granted. Joke most of the time, and save politics for talk that can be thoughtful and substantive. And outsource wisely. When a task is outside my skill or my time, and I can afford it, paying someone who does it well is not laziness. It is leverage. The older I get, the more that trade is worth.
Compressed into a mantra, it reads like this. Keep life simple. Accept reality. Improve my models of the world gradually, in myself and in others. Stand for compassion, progress, reason, and myself, and never surrender them.