If you ever find yourself in Los Angeles, do yourself a favor and hit up Kogi's twitter feed (twitter.com/kogibbq). You never know where their trucks are going to be, but I guarantee you they'll be a line when you get there.
Your best chance is to zero in on one of their 5 trucks' weekly stomping grounds and show up 5-10 minutes before they get there. You can also hit up their brick & mortar grill at the Alibi Room, but then you wouldn't get to stand in line behind 50 people waiting for a taco truck.
Highly Recommend: Short Rib Sliders ($5), Spicy Pork Tacos ($2)