Any leftover steak will keep in the refrigerator for about 3 days. You can heat it in the microwave or in a fry pan on low until heated through. Use the meat in a recipe similar to my Steak Fajitas. Some people like to make steak and eggs for a hearty breakfast. Or you can add the strips to a stir fry with veggies and a sauce. It would make a delicious steak taco salad.