Pack inside out
When you’re putting a whole load of your belongings all in one bag, there is always the risk of spillages or smudges. The last thing you want is to get to your hotel room, open your case, and discover that all of your carefully chosen outfits are smeared in suntan lotion. No one can relax by the pool if that’s happened.
Packing your clothes inside out won’t save them from major spillages, but it will help reduce the risk of smears and stains from any rough baggage handling. This won’t affect how you fold your clothes, other than that you’ll have a few labels sticking out.