Every hard-won lesson gets tossed in here. Pick one up. Turn it over. See if it fits something you're building.
Think of this like a tub of LEGO bricks. Every hard-won thing I've learned — the habits, the truths, the principles that actually held my life together — gets tossed in here. No order. No prescription. Pick one up, turn it over, see if it fits something you're building. Your build will look different from mine. That's entirely the point.