Using aluminum foil effectively involves a few tricks: 1) For cooking, use a double layer to prevent food from sticking and to distribute heat evenly. 2) When grilling, crumple the foil to create a heat-reflective dome for indirect cooking. 3) Line baking sheets with foil to simplify cleanup. 4) Use foil to create makeshift containers for baking, such as foil packets for vegetables or fish. 5) For storage, wrap food tightly to preserve freshness. 6) When roasting meats, tent with foil to lock in moisture. 7) Use foil to create a barrier between food and the grill grates to prevent flare-ups. Remember, avoid using foil with acidic foods as it can react and release aluminum into the food.