Since we're all giving uses for the leftover steak, I'll let some of Southwestern exposure come out. Take the steak and chop it into small cubes. Brown with onion, green pepper, some jalepinos, a bit of salt, a splash of lime juice, and a tbs. of chopped, fresh cilantro. Heat it all together and place on the center of a flour tortilla. Add sour cream, shredded sharp cheddar cheese (the cheese is optional) and guacamole, roll and serve up a really good carne asada burrito.
Or, cook the meat in a pan, with a half cup of water and a lid until well done. Then, add a tsp. of cummin, and a tsp. of cilantro. When the meat is tender, shred it with a fork and use it for shredded beef tacos, or enchiladas, or tamales. You can even use it to make tacidoes (sp), you know, those little rolled corn tortillas with the cheese and meat filling.
The meat can also be cut into thin strips and gently heated with your favorite hot sauce, some peppers, onions and lime, and served with crispy corn tortillas as fajitas (though they're usually made with chicken.
And don't even get me started with what you can do with the beef in oriental cooking, or even as beef with noodles and gravy.
There, between what's been posted before me, my suggestions, and the ones that are bound to come after, you should have enough ideas to last you a good while.
Seeeeeya; Goodweed of the North