When I first started carrying, I carried unchambered. That lasted about a month.
It’s an easy habit to break.
Raised in the NRA but my Dad was of the opinion that when you pulled a gun with nothing in the chamber, what you really pulled was a rock which needed time to be turned into a gun...my wife and I both carry with a round chambered and we both expect every gun in the home/on our person/anywhere else to be ready to go. That’s the biggest “trick” - always treat every weapon as if it’s loaded and ready to fire.