I suggest you begin by unpacking the larger boxes, such as clothing boxes that will go quickly, and items that belong in kitchen cabinets. It will help to get the larger boxes removed, and it will be very convenient to have your kitchen in operating condition as soon as possible. Any good move is a cooperative effort between you and the mover. Begin your moving day by making introductions and use the movers' names when addressing them. Any special instructions should be well-marked and mentioned to the movers.
Many companies have policies of non-acceptance of gratuities, including meals.
Ask the sales representative in advance about what the movers will expect. Let them know where to find these necessities so they can help themselves to everything. If you have any unusual problems on moving day, speak to the driver, who is usually the person in charge at the site. If the issue is not resolved, you can contact the company sales representative. Try to remain calm.