My favorite is to buy a boneless rib eye roast, make a prime rib roast (a la epicurious.com, roast prime ribs of beef with pink and green peppercorn crust, yum yum yum), have it for dinner, then have sandwiches/stir fry for a few days afterwards.
Just some salt and pepper, then into a very hot Calphalon hard-anodized pan that's been brushed with a little peanut oil. About 3-4 minutes per side, remove and let it rest covered on a warmed plate while I saute some mushrooms or onions (or both) in the pan. Add a bit of stock or Marsala wine to the pan to deglaze the fond, reduce it down a little and add the juices from the resting steak. Heaven!