I have a system, I learn just what aplys to me and my army, and take everyone else at their word. That works pretty well, as the store owner sort of patrolls the boards and catches any "mistakes" about the rules. Therefore the time it takes me to learn the new edition is a tiny fraction what it would be, because I only have to remember some of it. I dont even bother with missions, I just read them from the book as they become nesicary to know.
"A true king is never alone, his will is equal to the will of all of his followers."
-Alexander the Great, kind of