I "stack and roll" our clothes for packing.
In other words, I lay pants on top of one another then shorts, then roll them before putting them in the suitcase.
I do the same for my husbands and my shirts.
That way there are no hard creases in the clothing, like there may be when you fold each item individually.
When packing, we also pack 1/2 of each of our clothes in each suitcase. In case one bag "goes south", at least we'll have something to wear. We split up the formal wear....in case one bag goes missing, at least only one of us will have to rent formal wear. :-)