Here are some tips for labeling boxes when you are moving. Label items with a large, dark colored permanent marker.
If you are moving long distance using a professional mover, try to make itemized list of what is in the boxes. We lost 9 boxes on our last move and lost money from insurance because we could not tell them exactly what was in each box.
Go to your dollar/office supply store, and buy a packet of colored stickers; the type used as "price tags". They come in a variety of shapes and sizes - try to get the larger size.