When packing it's best not to mix items from different rooms in one box. "For example, don't pack articles from the living room in boxes with articles from the kitchen. This will save much confusion later when its time to unpack."
When packing keep related boxes together so they will end up in the same room in your new home. This will cut the carrying time and make the move more efficient.
"It is important to have your name and new address written on each box, especially for long distance moves." It might be difficult to do given huge number of boxes you might have. But in case one of your boxes is lost in the process it would be much easier for the moving company to find and mail it to your new address.
"When packing use red marker to indicate ""FRAGILE"" on delicates, and ""THIS END UP"" where appropriate." Make sure those notes are clearly visible and written on each side of the box.
When packing make a master list of all household items and your belongings. "You can also number the boxes, but make sure you don’t confuse those numbers with the numbers of rooms already written on your boxes."