For a normal maintenance visit, I would at least check the oil and filters, tire condition and pressure, brakes, fluids, battery, and general vehicle condition. The exact list depends on the car and its mileage, of course. I was looking through the auto services available from a local shop and liked that the service page covers several areas rather than focusing on only one type of work. That seems useful when you want to combine routine checks with something you already need done. I would still ask what is actually required for the specific vehicle instead of automatically paying for every possible service. A good maintenance visit should identify what needs attention now and what can reasonably wait until the next scheduled interval.