Interesting. I find I don't have the same sort of issue, because when I'm packing my thoughts are around the unpacking at the other end, ensuring that all things which want to be put into a given location are in the same box, mentally measuring where things that I'm putting away will go, where will be convinient, where will look nice.

Of course, it also helps that I enjoy object tetris. There's a certain satisfation to a well packed box, and the knowledge that fewer trips will have to be made as a result of it.