Tip Number Two: Compartmentalize
When packing for multiple trips, I separate my clothes into three piles: trip number one only, trip number two only, and trip numbers one and two. All of my clothes — including underwear, socks, and workout gear — go in their respective packing cube along with a plastic shopping bag. When I'm at my first destination, I only unpack from those packing cubes, and I leave the other ones alone. Because space is usually tight in my suitcase, I'll place dirty clothes inside the plastic bag and stuff it inside my packing cube so I can repack without any problems.