A piece of advice on packing and unpacking clothes: do it in your underwear.
Why, do you ask? Because, before sticking yet another 10-year-old shirt or over-worn pair of pants into a box or back on the hanger, you can slip it on and remind yourself why you rarely ever wear it. If the item only barely fits you, toss it aside and donate it to charity. I managed to clear nearly one quarter of my shirts and pants, which is quite the accomplishment for me. Yay, closet space!