Vegetables and fruits are fine for the garbage disposal, although you should avoid potato peels, as they can clog the drain.
Meat scraps are fine as long as there are no large bones that will damage the blades.
Coffee filters break down quickly and are fine to put in the disposal. And coffee grounds are said to help clear odors out of the disposal.
These items should be put down the disposal to clean it once a week.
Bread and dough can be placed in the garbage disposal; however, you should run a lot of hot water while using the disposal and for a few minutes afterward.