Cooking casseroles — If you are baking a casserole that has cheese on top, spray your foil with cooking spray before covering and the cheese will not be pulled off when you uncover the dish after baking.
To butter corn on cob. Take a piece of bread (any kind) and put a cube of butter on it. Take your cooked corn and holding the bread/butter in one hand, roll your corn back and forth across the buttered bread.
Fond is the stuck on caramelized bits off meat and vegetables left on the pan when something is seared. It is intensely flavored by caramelized so when you deglaze a pan it adds a lot of flavor to the final dish. Fond is also the crispy bits of rice and vegetables (meat) on the bottom of a pan when you make paella.