Place an aluminum foil tent over meat dishes, such as meatloaf, to keep the grease from splattering in an oven. The foil fits loosely over the meat to allow heat and steam to cook the dish, but keeps the grease from releasing into the oven.
Place casserole dishes on foil-lined cookie sheets before putting them in the oven to keep any spillage from running out and falling to the bottom. The aluminum foil makes cleanup easier.
Place a large, foil-lined cookie sheet length-wise on the bottom oven rack. Set large cooking dishes on the next rack up. For large cooking dishes that will not fit into a cookie sheet, the bottom pan catches grease or food run-off before it reaches the oven floor.