If you've got an Unholy DK, you probably understand me. You join some 5 man group, and the lazy ass healer doesn't heal your pet, and you're too busy DPSing to heal him. He dies over and over again, and you burn through you're corpse dust, and most of the time don't even have a pet. What this macro does, is allows you to heal your pet, without having to click him, then reclick the NPC you were previously killing (Which is annoying on AoE pulls).
This uses Focus, so if you use it for something else, it'll **** it up.
Code:
/Focus
/target Pet
/cast Death Coil
/Target Focus
/Focus End
It's simple, but I haven't seen it anywhere else. Hope it helps.