Use proper packaging - Boxes makes the move a lot easier, and takes better care of your belongings.
Make sure the bottom of the boxes is folded correctly, or is properly taped.
Fill the boxes - it makes less room for movement, and the box will keep its shape. If needed you can put paper on top of , and between, the items.
Do not use to big boxes on heavier things, like books. Remember that the box is gonna be carried. Please control wheight by lifting the box while packing it.
Mark the boxes clearly on the outside, write on top and one of the sides.
Use enough paper. Use wrap paper instead of newspapers, then you do not have to wash of so many stains afterwards.
Put clothes in layers, then they will not wrinkle as easily.
Clothes on hangers - put a black bag over it, make a hole in the bottom, pull the handle of the hanger through. If needed you can use paperwardrobes for your most delicate clothing.
Stoneware and glass requires extra caution. Put a towel or a blanket in the bottom of the box, and always place the heaviest items in the bottom. Use a lot of paper between to avoid friction and impact between the items.
Dishes should be packed with paper between, and set upright in the box. Plates are more likely to be damaged if stacked vertically.
Stemmed glass should be put with stem pointing upwards in the box.