To properly wrap food with aluminum foil, first ensure the shiny side of the foil faces outward. This side is non-stick and prevents food from sticking to the foil. Place the food in the center of a piece of foil large enough to cover it completely. Bring the edges of the foil together over the food, then fold and crimp the edges to seal tightly, creating a sealed pouch. This will help retain moisture and heat, and keep the food from sticking to the foil.