So I'm having some trouble with what to do about nonlethal damage and how to knock people unconscious by using the new variant rule from Ultimate Combat called "Wounds and Vigor".
By the old rules: "When your nonlethal damage equals your current hit points, you're staggered. You can only take a standard action or a move action in each round (in addition to free, immediate, and swift actions). You cease being staggered when your current hit points once again exceed your nonlethal damage.
When your nonlethal damage exceeds your current hit points, you fall unconscious. While unconscious, you are helpless."
The Wounds and Vigor variant rule: "When a creature takes nonlethal damage, it takes that damage in vigor points only, even if the attack deals more damage than the creature has vigor points. If the creature has no vigor points (and no temporary vigor points), each time that creature takes damage from an attack that deals nonlethal damage, it takes either 1 wound point of damage, or a number of wound points in damage equal to the attack's critical hit modifier if the attack is a critical hit."
(both quotes taken from http://paizo.com/pathfinderRPG/prd/)
