Ensure your stir-fry is properly worked over the "hot spot" in your wok. Do this by flipping and stirring repeatedly, moving the bottom of the mixture to the top. If rice sticks to the wok, add a light amount of oil to help keep it moving.
Its important not to add to the serving size too much because of the limited amount of "hot spot" in your wok.
For more flavor, add a tablespoon of oyster sauce and a tablespoon of soy sauce. To clean out the fridge, substitute ham with yesterday's meat leftovers. To be more traditional, add frozen peas with the meat.