When shopping for autos, the best time to purchase an auto is year end. The dealerships need to make room for their new year inventory.
Buy only things that you need not want. For example check your pantry and cabinets before you grocery shop. You may already have food item in stock and not need to purchase.
When driving drive the speed limit and not over. This helps you save on gas, the faster you drive the more fuel the car burns.
Use coupons when shopping for groceries, auto maintenance etc. If you can use them on sale items or services do so.