Bedtime used to be torture. Dalanie would throw a fit if her book and Book of Mormon weren't read first, if she didn't say her prayer first, and if she didn't get tooth paste on her tooth brush first. As soon as she'd start in on her tantrum, Hudson always conceded. It upset me that she always got away with it.
It took a few days, but we started alternating so each kid could have their book read or say prayers first. So when she thought about getting upset we'd remind her "next time you get to be first."
Turns out that "next time" has settled more than one fight.
"Next time me be nice." (Be nice has become her favorite answer to any question in FHE.)
"Next time me get bubble gum."
"Next tim me go to Grandma's."
"Next time, next time, next time . . . "