The key to good worldbuilding is leaving out most of what you create. You, as the author, had damn well better know the where all that dragon food comes from, but that doesn't mean that I, as a reader, want to read a five thousand word essay about you explaining it to me. I don't need to see the math, but I can tell by the details you provide whether or not you've thought these things through to their logical conclusions.

Pride is always a better lever against the nobility than reason.

When someone writes something dazzlingly brilliant, people want to imitate it. The result is a lot of less-than-brilliant knock-offs. Elves, Dwarves, Goblin army, cursed ring, evil sorcerer. Tolkien did it. It rocked. Let's move on. Let's do something new.

He was giving me enough rope to hang myself with. Apparently he didn't realize that once a noose is tied it will fit one neck as easily as another.

Abenthy gave me an appraising look. I'd been waiting for it. It was the look that said, "You don't sound as young as you look." I hoped he'd come to grips with it fairly soon. It gets tiresome being spoken to as if you are a child, even if you happen to be one.

Truth is a troublesome motherfucker unless it's handled properly

Denna is a wild thing," I explained. "Like a hind or a summer storm. If a storm blows down your house, or breaks a tree, you don't say the storm was mean. It was cruel. It acted according to its nature and something unfortunately was hurt. The same is true of Denna.