Tie down each quarter and fill open spaces with small boxes to keep the load from shifting. Load largest items first. Usually appliances, then furniture. Put heavy boxes on bottom and lighter ones on top. Stack boxes of equal size and weight.
Long items go on sides.
Place mattresses, sofas and tables on edge against truck walls and tie down. Tie to truck walls or place between mattresses. Odd-shaped items go along walls or on top of the load. Roll rugs and place them in the center. Lock the truck.