Sandwiches, Calzones, Burritos
It seems odd to have a page of recipes about sandwiches, except that they are a great way to use up leftovers without feeling like you're eating the exact same thing again. A grill like the George Foreman Grill makes it a snap to whip some tasty grilled sandwiches or quesadillas.
Meat Pies - great for lunches
Monte Cristo Sandwiches - ham and cheese meets French toast