WSJ has a column by Jeremy Wagstaff on how to pack for travel:
To me the big innovation in packing is the module. The thinking is simple: Why collect all the individual things we are going to take with us on our trip and then lump it together? Most of us, if the flight is not actually about to depart, make little piles of our underpants, socks, shirts, etc on our bed before cramming them into the suitcase, hoping they fit, squeezing a sock-ball here, a handkerchief there. At the other end, we throw the case on the bed, rummage around inside, with shirts, vests, scarves and boots flying everywhere in a sort of reverse action replay. It’s horrible, and if we then have to move room, hotel, or continent again on the trip chances are not a single item of clothing looks anything like when we bought it.
So technology’s answer to this problem is: Stay at home. Let someone else do the trip. No, actually, it’s modular packing, sometimes called packing cubes. It’s simple enough: Instead of throwing everything into one bag, you put them into smaller sub-bags, which then go into the big bag. So the big bag, instead of being a pile of sundry items in varying degrees of crumplitude, is a neat collection of different size sub-bags, or modules.