Vacuum bags
If, even with Chanel’s wonderful advice. You still end up with a suitcase that you need to sit on to zip closed, then this next hack could sort you out. While packing cubes are a great way of organizing your luggage, it will still take up just as much space as it did before.
With some compression bags, you can reduce the amount of space you’re taking up. These bags squash all of the air out of your clothes, making them much smaller in volume. Don’t forget, your case will still weigh the same, and you might have to deal with more wrinkles at the other end.