My favorite place for buying carne asada is the King Ranch Market in Monrovia. Perhaps I went a little overboard buying four and a half pounds for four people... but then again, leftover carne asada is never a problem. I also got a bag of Guerrero 4.5" tortillas - my favorite kind for making tacos.
While the carne was cooking on the grill (which only takes about five minutes) I chopped up a lot of cilantro and some sweet onion. When the meat was done I chopped it up and assembled tacos with the ingredients, plus a roasted red salsa from the market. They were awesome. The game was not.
PS - My comment about leftover carne not being a problem? A couple days later I was at my parents' house and there was still some left, so I made some nachos with jalapeno jack and cheddar cheese, grilled corn, and Taco Lita hot sauce. They were even better than the tacos.