A good friend turned me onto "packing cubes."  (She's now been upgraded to a bestie!)  I wasn't entirely convinced until she did a demonstration on  packing for an upcoming trip.  I immediately ordered two sets (red for me, blue for my husband), since I thought ShackePak would be the best value (they are!)  I was amazed at how many items I could fit  into each cube, how organized it kept our clothes and how they could easily be arranged in our suitcases.  Going forward, we will ONLY travel using packing cubes from now on!  Now our clothes can be easily identified as his or mine.