I just hit or am about to hit 80: Now what?

First things first: the magic number to hit as far as defense is 540 or 535, note that there are combinations of Resilience and Defense that can add up to the required crit reduction, you’re looking for a total of 4.39% or 4.35% crit reduction, depending on if you’re doing heroics or raids. Before you step foot into PuG heroics you’ll want to get a few normal instances under your belt.