How does one make Chipotle: Mexican grill tasting burritos?

I love going there. I go once a week. It's practically religious. I order that same thing every time: Burrito, no beans, double steak, corn salsa, sour cream, cheese, lettuce. How can I make a tasty burrito just like them? I basically need directions on how to prepare and spice the steak and corn. oh and where/how can i get uber strong tortillas :D