Preheat barbeque grill.
In a large bowl combine soy sauce, Worcestershire sauce, pineapple juice, lime juice, and salt; mix well.
Dip steak in the marinade. Grill over very high heat, until done, about 6 to 8 minutes. Baste frequently.
Slice into thin strips then serve with flour tortillas, salsa, tomato, chopped onion, and sour cream.
Servings: 8